From diaballo and phtheiro; to rot thoroughly, i.e. (by implication) to ruin (passively, decay utterly, figuratively, pervert) -- corrupt, destroy, perish.
see GREEK diaballo
see GREEK phtheiro
1. to change for the worse, to corrupt: minds, morals; τήν γῆν, i. e. the men that inhabit the earth, Revelation 11:18; διεφθαρμένοι τόν νοῦν, 1 Timothy 6:5 (τήν διάνοιαν, Plato, legg. 10, p. 888 a.; τόν γνώμην, Dionysius Halicarnassus Antiquities 5, 21; τούς ὀφθαλμούς, Xenophon, an. 4, 5, 12).
2. to destroy, ruin, (Latinperdere);
a. to consume, of bodily vigor and strength: ὁ ἔξω ἡμῶν ἄνθρωπος διαφθείρεται (is decaying), 2 Corinthians 4:16; of the worm or moth that eats provisions, clothing, etc. Luke 12:33.
b. to destroy (Latindelere): Revelation 8:9; to kill, διαφθείρειν τούς, etc. Revelation 11:18.