καταφθείρωkataphtheírō

1 to destroy entirely.

Greek (New Testament) · G2704

Meanings

2. In moral sense (as LXX), to deprave, corrupt: passive perfect participle, followed by τ. νοῦν, 2 Timothy 3:8.

Same root

κατάkatá · G2596(prepositionally) down (in place or time), in varied relations (according to the case (genitive, dative or accusative) with which it is joined)
φθείρωphtheírō · G5351properly, to shrivel or wither, i.e. to spoil (by any process) or (generally) to ruin (especially figuratively, by moral influences, to deprave)

Where it appears

Appears 1 times in the Bible.

2 Timothy 3:8 These teachers oppose the truth just as Jannes and Jambres opposed Moses. They have depraved minds and a counterfeit faith.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.