G5351–φθείρω–phtheirō

If any one is marring the Sanctuary of God, him will God mar; for the Sanctuary of God is holy, which you all are.

φθείρει, phtheirei “destroys,”φθερεῖ phtherei “will destroy”

Do not deceive yourselves: "Evil companionships corrupt good morals."

φθείρουσιν phtheirousin “Do corrupt”

Make room for us in your hearts. There is not one of you whom we have wronged, not one to whom we have done harm, not one over whom we have gained any selfish advantage.

ἐφθείραμεν, ephtheiramen “we have corrupted,”

But I am afraid that, as the serpent in his craftiness deceived Eve, so your minds may be led astray from their single-heartedness and their fidelity to Christ.

φθαρῇ phtharēa “may be corrupted”

to put away, in regard to your former mode of life, your original evil nature which is doomed to perish as befits its misleading impulses,

φθειρόμενον phtheiromenon “is being corrupted”

But these men, like brute beasts, created (with their natural instincts) only to be captured or destroyed, are abusive in matters of which they are ignorant, and in their corruption will perish,

φθαρήσονται phtharēsontai “will be destroyed”

Yet these men are abusive in matters of which they know nothing, and in things which, like the brutes, they understand instinctively--in all these they corrupt themselves.

φθείρονται. phtheirontai “they corrupt themselves.”

True and just are His judgments, because He has judged the great Harlot who was corrupting the whole earth with her fornication, and He has taken vengeance for the blood of His bondservants which her hands have shed."

ἔφθειρεν ephtheiren “was corrupting”