Multiplied for him is the punishment on the Day of Resurrection, and he will abide therein humiliated -
Sahih International
يُضَـٰعَفْ
yuḍāʿaf
Will be doubled
Word breakdown
يُضعفْ
Fi'l · VerbWill be doubled
to double, to multiply, to weaken
52× in the Quran · Occasional
Grammar rules
يُضَـٰعَفْ (Will be doubled) is in the jussive mood — it comes after لم ("did not") or a conditional word, which shortens its ending.
We translate it as "did not [verb]" or as part of a condition.
Lesson 10 · Commands & Futureيُضَـٰعَفْ (Will be doubled) is passive — the action is happening to someone, but who is doing it is not mentioned.
We translate it as "is/was [done]" — e.g. "was created", "is known".
Lesson 11 · Passive & Participlesيُضَـٰعَفْ (Will be doubled) uses form III (فَاعَلَ) — it describes doing something with or to each other.
The action involves two parties.
Lesson 12 · Verb Families II–IV