In their hearts is disease, so Allāh has increased their disease; and for them is a painful punishment because they [habitually] used to lie.
Sahih International
Grammar, phrase by phrase
فِى قُلُوبِهِم
(In their hearts)
Root قلب — heart; to turn, overturn, return · 168 times in the Quran
فِىword 1
Particle · حرفA particle is a small helper word of one to three letters that works like glue — it connects or adjusts other words rather than naming something or describing an action, and it can never be the one a sentence is about. فِى · 'in' is such a helper. L1 · R9
Preposition · حرف جرA preposition is a little helper word that relates one thing to another; Arabic keeps a short list of them — small words like فِي 'in', مِنْ 'from', and عَلَىٰ 'on'. فِى · 'in' is one of these relation-words. L4 · R2
قُلُوبِهِمword 2
Noun · اسمA noun is a word that names a person, place, thing, or idea. قُلُوبِ names such a thing: 'their hearts', from the root قلب: heart; to turn, overturn, return. L1 · R6
Feminine Noun · اسم مؤنثA feminine noun is a naming word Arabic treats as grammatically 'she'. قُلُوبِ is a plural built by reshaping its word from the inside rather than by adding an ending, and it wears no feminine marker — no ة at its end, no final ى, no اء — yet Arabic treats it as feminine: 'their hearts'. L2 · R2
Plural Noun · جمعA plural noun refers to three or more, made by reshaping the word from the inside — a 'broken' plural. قُلُوب is the broken plural of قَلْب 'heart', reshaped from within to mean 'hearts'. L2 · R6
Genitive · مجرورThe genitive is the ending a noun (a naming word) takes after a preposition — a little word like 'in' or 'to' — and it is marked by a kasrah ـِ, a small slanted stroke written below the letter. قُلُوبِ stands right after such a little word and carries exactly that kasrah ـِ on its own final letter — tucked inside قُلُوبِهِم, just before the small piece fastened to the word's end. L2 · R12
Attached Pronoun · ضمير متصلAn attached pronoun is a mini-word for 'their' glued onto the end of another word. The ending هِم on قُلُوبِهِم is such a suffix, meaning 'their', so the word reads 'their hearts'. L3 · R6
Possessive (Idafa) · مضاف إليهA possessive chain joins two words into an 'of' phrase, and the second, the owner, takes the genitive. Here the attached هِم 'their' fills that owner slot on قُلُوب 'hearts' — 'the hearts of them', that is, 'their hearts'. L5 · R5
مَّرَضٌۭ
(…is disease,)
Root مرض — sickness, to be ill, disease · 24 times in the Quran
مَّرَضٌۭword 3
Noun · اسمA noun is a word that names a person, place, thing, or idea. مَّرَضٌ names such a thing: '(is) a disease', from the root مرض: sickness, to be ill, disease. L1 · R6
Masculine Noun · اسم مذكرArabic treats every noun — every naming word — as grammatically 'he' or 'she'. مَّرَضٌۭ carries no feminine marker — no ة at its end, no final ى, no اء — so it takes the default and is treated as 'he': a masculine noun. L2 · R3
Indefinite Noun · نكرةAn indefinite noun means 'a' or 'any' one of something — no particular one — and it never wears the definite article ال ('the'); instead it shows this with tanwīn, a doubled end-vowel mark. مَّرَضٌ carries the tanwīn ـٌ — the ḍammah ـُ doubled — marking it as unspecified: '(is) a disease'. L2 · R8
Nominative · مرفوعThe nominative is the ending a naming word takes when it is the main topic, and its indefinite form is the tanwīn ḍammah ـٌ. مَّرَضٌ ends in that ـٌ, marking it as the topic — the disease that is 'in their hearts'. L2 · R10
Subject (Mubtada') · مبتدأThe subject is the noun the sentence talks about — its topic — and it stands in the nominative, the 'topic form' usually shown by a ḍammah ـُ, a small curl written above the final letter, doubled to the tanwīn ـٌ when the word is indefinite. Here 'in their hearts' comes first and مَّرَضٌ 'a disease' is the topic that follows — 'in their hearts is a disease' — carrying its nominative ـٌ. L6 · R2
The disease in their hearts is doubt — a disease in the religion, not a physical illness; they are the hypocrites, and the disease is the doubt they brought to Islam.
Ibn Kathir (abridged), on 2:10
So far: “In their hearts is disease,”
فَزَادَهُمُ ٱللَّهُ
(…so Allāh has increased them)
Root زيد — to increase, to add · 61 times in the Quran
Root اله — god · 2,851 times in the Quran
فَزَادَهُمُword 4
Resumptive Particle · حرف استئنافA resumptive particle is a وَ or فَ that begins a fresh statement after a pause or a shift of topic — it starts the speech anew rather than adding one more item to a list. The prefix فَ · 'then' at the front of فَزَادَهُمُ opens such a fresh start. L14 · R1
Verb · فعلA verb is a word for an action or happening that is always tied to a time — past, present/future, or a command. زَادَ speaks of an action already carried out: 'so has increased them', from the root زيد: to increase, to add. L1 · R7
Past Tense Verb · فعل ماضٍA past-tense verb describes an action already completed. Its plain base shape — the shape Arabic uses for a single 'he' — carries no who-ending glued to its tail, and زَادَ is exactly that bare base: 'so has increased them', from the root زيد: to increase, to add. L8 · R1
Weak Verb · فعل معتلA weak verb is a verb that carries و or ي — the 'weak' letters, which love to soften into long vowels or vanish — among its root letters. The root of زَادَ is زيد: to increase, to add — and its middle letter is the weak ي, so the weakness sits in the middle of the root. L24 · R4
Attached Pronoun · ضمير متصلAn attached pronoun is a mini-word for 'me / us / them' that cannot stand alone — it is glued onto the end of another word, and each form carries within it exactly who is meant. هُمُ · 'them/their' is fastened to the tail of the verb here — فَزَادَهُمُ — naming the one the action lands on. L3 · R6
Direct Object · مفعول بهThe direct object is the one the action lands on, so it stands in the accusative — the 'landed-on form', usually shown by a fathah ـَ, a small slanted stroke above the final letter. The suffix هُمُ 'them' is that object here — 'Allah increased them' (in disease); on this attached pronoun the shape is fixed, so no fathah appears, but the role it fills is the accusative one. L9 · R9
ٱللَّهُword 5
Noun · اسمA noun is a word that names a person, place, thing, or idea — and in Arabic this includes proper names. ٱللَّهُ is a proper name: 'Allah'. L1 · R6
Nominative · مرفوعThe nominative is the ending a naming word takes when it is the one doing the action, shown by a ḍammah ـُ — a small curl above the final letter. ٱللَّهُ ends in that ḍammah ـُ, marking it as the doer of the increasing. L2 · R10
Doer (Fa'il) · فاعلThe doer is the one performing the action in a verb-first sentence, in the nominative ending. The verb زَادَ 'increased' came first; ٱللَّهُ is the one who does it — 'Allah has increased'. L9 · R2
مَرَضًۭا ۖ
(…in disease;)
Root مرض — sickness, to be ill, disease · 24 times in the Quran
مَرَضًۭا ۖword 6
Noun · اسمA noun is a word that names a person, place, thing, or idea. مَرَضًا names such a thing: '(in) disease', from the root مرض: sickness, to be ill, disease. L1 · R6
Masculine Noun · اسم مذكرArabic treats every noun — every naming word — as grammatically 'he' or 'she'. مَرَضًۭا carries no feminine marker — no ة at its end, no final ى, no اء — so it takes the default and is treated as 'he': a masculine noun. L2 · R3
Indefinite Noun · نكرةAn indefinite noun means 'a' or 'any' one of something — no particular one — and it never wears the definite article ال ('the'); instead it shows this with tanwīn, a doubled end-vowel mark. مَرَضًا carries the tanwīn ـً — the fathah ـَ doubled — marking it as unspecified: '(in) disease'. L2 · R8
Accusative · منصوبThe accusative is the ending a naming word takes when the action lands on it, marked by a fathah ـَ, doubled to the tanwīn ـً when indefinite. مَرَضًا carries that tanwīn ـً, as the thing added by the increasing: Allah increased them 'in disease'. L2 · R11
Direct Object · مفعول بهThe direct object is the thing the action lands on, so it stands in the accusative — the 'landed-on form', usually shown by a fathah ـَ, a small slanted stroke above the final letter, doubled to the tanwīn ـً when the word is indefinite. مَرَضًا is what the increasing adds — the disease itself — carrying the tanwīn fathah ـً of that role. L9 · R3
'Allah increased their disease' also means doubt — He increased them in shameful behavior, evil added to their evil and deviation to their deviation, a punishment fitting the sin.
Ibn Kathir (abridged), on 2:10
So far: “In their hearts is disease, so Allāh has increased their disease;”
وَلَهُمْ
(…and for them)
وَلَهُمْword 7
Resumptive Particle · حرف استئنافA resumptive particle is a وَ or فَ that begins a fresh statement after a pause or a shift of topic — it starts the speech anew rather than adding one more item to a list. The prefix وَ · 'and' at the front of وَلَهُمْ opens such a fresh start. L14 · R1
Preposition · حرف جرThe small prefix لَ at the front of وَلَهُمْ is a preposition — a little helper word meaning 'to/for' that relates one thing to another. A preposition 'pulls' the word that follows it into the genitive relationship — the 'of / in / with' role a word plays after such a little helper — though not every word shows that role with the same visible ending. L4 · R1
Detached Pronoun · ضمير منفصلA detached pronoun is a standalone word for 'they', 'you', 'I', and the like. هُمْ is 'them' here, joined after the preposition لَ to say 'for them'. L3 · R2
عَذَابٌ أَلِيمٌۢ
(…is a painful punishment)
Root عذب — to punish, torture; punishment, torment · 373 times in the Quran
Root الم — pain, anguish, to hurt · 75 times in the Quran
عَذَابٌword 8
Noun · اسمA noun is a word that names a person, place, thing, or idea. عَذَابٌ names such a thing: '(is) a punishment', from the root عذب: to punish, torture; punishment, torment. L1 · R6
Masculine Noun · اسم مذكرArabic treats every noun — every naming word — as grammatically 'he' or 'she'. عَذَابٌ carries no feminine marker — no ة at its end, no final ى, no اء — so it takes the default and is treated as 'he': a masculine noun. L2 · R3
Indefinite Noun · نكرةAn indefinite noun means 'a' or 'any' one of something — no particular one — and it never wears the definite article ال ('the'); instead it shows this with tanwīn, a doubled end-vowel mark. عَذَابٌ carries the tanwīn ـٌ — the ḍammah ـُ doubled — marking it as unspecified: '(is) a punishment'. L2 · R8
Nominative · مرفوعThe nominative is the ending a naming word takes when it is the main topic, in its indefinite form the tanwīn ḍammah ـٌ. عَذَابٌ ends in that ـٌ, marking it as the topic — the punishment that is 'for them'. L2 · R10
Subject (Mubtada') · مبتدأThe subject is the noun the sentence talks about — its topic — and it stands in the nominative, the 'topic form' usually shown by a ḍammah ـُ, a small curl written above the final letter, doubled to the tanwīn ـٌ when the word is indefinite. Here 'for them' comes first and عَذَابٌ 'a punishment' is the topic that follows — 'for them is a punishment' — carrying its nominative ـٌ. L6 · R2
أَلِيمٌۢword 9
Noun · اسمA noun is a word that names a person, place, thing, or idea. أَلِيمٌۢ names such a thing: 'painful', from the root الم: pain, anguish, to hurt. L1 · R6
Indefinite Noun · نكرةAn indefinite noun is a naming word left general — not pinned to one known thing by the definite article ال ('the') — and it shows this with tanwīn, a doubled end-vowel mark. أَلِيمٌۢ carries the tanwīn ـٌ — the ḍammah ـُ doubled: 'painful'. L2 · R8
Nominative · مرفوعThe nominative is shown by a ḍammah, in its doubled indefinite form the tanwīn ـٌ. أَلِيمٌ ends in that ـٌ, copying the ending of عَذَابٌ, the word it describes. L2 · R10
Adjective · صفةAn adjective is a describing word that comes after its noun and matches it in gender, number, ending, and 'the'-ness. أَلِيمٌ follows عَذَابٌ and matches it — both masculine, both indefinite with the tanwīn ـٌ — describing the punishment as painful. L7 · R1
بِمَا
(…because)
بِمَاword 10
Preposition · حرف جرThe small prefix بِ at the front of بِمَا is a preposition — a little helper word meaning 'in/with' that relates one thing to another. A preposition 'pulls' the word that follows it into the genitive relationship — the 'of / in / with' role a word plays after such a little helper — though not every word shows that role with the same visible ending. L4 · R1
Relative Pronoun · اسم موصولA relative pronoun is a word that hooks a whole describing sentence onto its meaning. مَا · 'because' is the relative word Arabic uses for non-human things — 'what' or 'that which' — one fixed shape for any gender and any number: its ending never changes to show its job in the sentence. L5 · R13
كَانُوا۟
(…they used to)
Root كون — to be, exist, happen · 1,390 times in the Quran
كَانُوا۟word 11
Verb · فعلA verb is a word for an action or happening that is always tied to a time — past, present/future, or a command. كَانُ speaks of an action already carried out: 'they used to', from the root كون: to be, exist, happen. L1 · R7
Past Tense Verb · فعل ماضٍA past-tense verb describes an action already completed — and it shows who by a small ending fastened to the verb's tail. On كَانُوا۟ that ending is وا۟, telling exactly who is meant: 'they used to', from the root كون: to be, exist, happen. L8 · R2
Weak Verb · فعل معتلA weak verb is a verb that carries و or ي — the 'weak' letters, which love to soften into long vowels or vanish — among its root letters. The root of كَانُ is كون: to be, exist, happen — and its middle letter is the weak و, so the weakness sits in the middle of the root. L24 · R4
Kāna Verb · كان وأخواتهاكَانَ is an incomplete verb: it needs both a topic and a comment to finish its meaning, and it keeps that topic in the nominative — the 'topic form', usually shown by a ḍammah ـُ, a small curl above the final letter. Its topic here is the وا۟ 'they' — a pronoun keeps one fixed shape, so no ḍammah appears, but the role it fills is the nominative one — and the comment is the verb that follows: 'they used to lie'. L18 · R1
Attached Pronoun · ضمير متصلAn attached pronoun is a mini-word glued onto another word. The وا۟ ending on كَانُوا۟ is such a suffix, standing for 'they' — the topic of كَانَ, kept in the nominative, the 'topic form' usually shown by a ḍammah ـُ, a small curl above the final letter; the pronoun itself keeps one fixed shape, so no ḍammah appears, but the role it fills is the nominative one. L3 · R6
يَكْذِبُونَ
(…lie.)
Root كذب — to deny, reject; to lie, falsehood · 282 times in the Quran
يَكْذِبُونَword 12
Verb · فعلA verb is a word for an action or happening that is always tied to a time — past, present/future, or a command. يَكْذِبُ is an action unfolding now: '[they] lie', from the root كذب: to deny, reject; to lie, falsehood. L1 · R7
Present Tense Verb · فعل مضارعA present-tense verb describes an action happening now or still to come, and it is recognized by its opening letter — one of the four present-tense prefixes أ ن ي ت. يَكْذِبُ opens with exactly such a letter: '[they] lie', from the root كذب: to deny, reject; to lie, falsehood. L8 · R3
The Five Verbs · الأفعال الخمسةThe Five Verbs are the five present-tense shapes whose ending closes with the letter ن — يَفْعَلَانِ, تَفْعَلَانِ, يَفْعَلُونَ, تَفْعَلُونَ, تَفْعَلِينَ. يَكْذِبُونَ is one of them: its ending ونَ keeps that closing ن, and for these five shapes the kept ن is itself the grammar-sign that the verb stands in its plain, ordinary mood. L10 · R10
Attached Pronoun · ضمير متصلAn attached pronoun is a mini-word for 'I / you / he' that cannot stand alone — it is glued onto the end of another word, and each form carries within it exactly who is meant. ونَ · 'them/their' is fastened to the tail of the verb here — يَكْذِبُونَ — naming the one who did the action. L3 · R6
Doer (Fa'il) · فاعلThe doer is the one performing the action, so it stands in the nominative — the 'subject form', usually shown by a ḍammah ـُ, a small curl written above the final letter. The ونَ ending on يَكْذِبُونَ is that doer, 'they' — the ones who used to lie; on this attached pronoun the shape is fixed, so no ḍammah appears, but the role it fills is the nominative one. L9 · R4
The hypocrites have two marks: they lie, and they deny the Unseen. This punishment is because they used to tell lies.
Ibn Kathir (abridged), on 2:10
So far: “In their hearts is disease, so Allāh has increased their disease; and for them is a painful punishment because they [habitually] used to lie.”