Lexical Definition

‎διαφθείρω‎ diaphtheírō (dee-af-thi'-ro) to destroy ^G:V
from ‎διαβάλλω‎ and ‎φθείρω‎

corrupt, destroy, perish.

• to rot thoroughly, i.e. (by implication) to ruin (passively, decay utterly, figuratively, pervert)

Abbott-Smith

δια-φθείρω [in LXX chiefly for שׁחת hi. ;]
1. to destroy utterly: Lk 12:33, Re 11:18; pass., to be destroyed, disabled: Re 8:9, II Co 4:16.
2. In moral sense, to corrupt, deprave: τ. γῆν, Re 11:18; pass., διεφθαρμένοι τ. νοῦν, I Ti 6:5.†

Abbott-Smith References

Liddell-Scott-Jones

διαφθείρω,

future -φθερῶ[Refs 5th c.BC+], Epic dialect -φθέρσω[Refs 8th c.BC+]: perfect διέφθαρκα [Refs 5th c.BC+]:— passive, future διαφθᾰρήσομαι [Refs 5th c.BC+]; Ionic dialect διαφθερέομαι [Refs 5th c.BC+]: 3rd.pers. plural pluperfect διεφθάρατο [Refs]:—destroy utterly, πόλιν [Refs 8th c.BC+]; make away with, kill, τινά [Refs]; destroy, ruin, ἥδ᾽ ἡμέρα φύσει σε καὶ διαφθερεῖ S.[same place]; τὴν τύχην [Refs]; δ. χεῖρα weaken, slacken one's hand, [Refs 5th c.BC+]; spoil, break, ὑγιῆ λίθον [Refs 2nd c.BC+]; τὰ θυρώματα διεφθάρθαι [Refs]; δ. τὴν συνουσίαν break up the party, [Refs 5th c.BC+]

__2 in moral sense, corrupt, ruin, γνώμην [Refs 4th c.BC+]; δ. τοὺς νέους, τοὺς νεωτέρους, [Refs 5th c.BC+]; especially corrupt by bribes, [Refs 5th c.BC+]; δ. γυναῖκα seduce a woman, [Refs 5th c.BC+]; δ. τοὺς νόμους falsify, counterfeit them, [Refs 5th c.BC+]; τὰ φεφ αδηκότα [Refs 5th c.BC+]
__3 οὐδὲν διαφθείρας τοῦ χρώματος having changed nothing of his colour, [Refs 5th c.BC+]
__4 of a woman, to lose by miscarriage or premature birth, ἔμβρυα, βρέφος, [Refs 5th c.BC+]: absolutely, miscarry, [Refs 5th c.BC+]:—passive, τῶν διαφθαρεισῶν τὰ ἔμβρυα [Refs 5th c.BC+]
__5 lose, forget, [Refs 5th c.BC+]
__6 ={διάγω}, uncertain in [Refs]
__II passive, to be destroyed, δ. ἐπὶ τοῖς ἱματίοις to be murdered for the clothes he wore, [Refs 5th c.BC+]; of animals, frequently in Papyrus, [Refs 2nd c.AD+]; especially to be crippled, disabled, [Refs 5th c.BC+]; of ships,[Refs 5th c.BC+]; to be spoilt, γάλα [Refs 5th c.BC+]; to be corrupted, αἷμα [Refs 2nd c.AD+]deaf, [Refs 5th c.BC+]; τὰ σκέλεα διεφθάρησαν had their legs broken, [Refs 5th c.BC+]blinded, [Refs 5th c.BC+]; τὸ φρενῶν διαφθαρέν, ={φρενοβλάβεια}, [Refs 5th c.BC+] decomposed, of a corpse, [Refs 5th c.BC+]
__III perfect διέφθορα intransitive, to have lost one's wits, διέφθορας [Refs 8th c.BC+] corrupted blood, [Refs]; frequently in later Prose, γάλα δ. ἤδη [Refs 1st c.AD+]; but,
__III.2 in Trag. and Comedy texts always transitive [Refs 5th c.BC+]
__IV aorist διέφθειρα intransitive, became corrupt, [LXX]

_{LSJ Scripture Refs: LXX.Josh.2.19}