The people of Noah denied before them and the [disbelieving] factions after them, and every nation intended [a plot] for their messenger to seize him, and they disputed by [using] falsehood to [attempt to] invalidate thereby the truth. So I seized them, and how [terrible] was My penalty.
Sahih International
كَذَّبَتْ
kadhabat
Denied
Word breakdown
كذبتْ
Fi'l · VerbDenied
to deny, reject; to lie, falsehood
282× in the Quran · Common
Grammar rules
كَذَّبَتْ (Denied) is a past tense verb — the action already happened and is complete.
We translate it in past tense — "did", "created", "said", etc.
Lesson 8 · Verbs — Past & Presentكَذَّبَتْ (Denied) uses form II (فَعَّلَ) — the middle letter is doubled, which makes the meaning stronger or causative.
The meaning is more intense than the basic form, or means "to make someone do [action]".
Lesson 12 · Verb Families II–IV