φθείρω

1 Corinthians 3:17 φθείρει, φθερεῖ destroys,, will destroy

If anyone destroys God’s temple, God will destroy him; for God’s temple is holy, and you are that temple.

Here: Present tense, 'is ruining'. It covers wrecking or spoiling a building and also corrupting something morally. Here it means tearing the community apart through faction and empty 'wisdom'.

1 Corinthians 15:33 φθείρουσιν Do corrupt

Do not be deceived: “Bad company corrupts good character.”

Here: "Ruin" or "spoil." The present tense states a general truth: this is what bad company always does. The word ties into the rest of the chapter, where Paul sets decay (phthora) against the body that will not decay (15:42, 50–54).

2 Corinthians 7:2 ἐφθείραμεν, we have corrupted,

Make room for us in your hearts. We have wronged no one, we have corrupted no one, we have exploited no one.

Here: 'We ruined / corrupted.' The word covers damaging someone's morals or faith, ruining them in some other way (financially, for example), and even seduction. Paul does not say which, so the denial may be deliberately broad: we have done no one damage of any kind.

2 Corinthians 11:3 φθαρῇ may be corrupted

I am afraid, however, that just as Eve was deceived by the serpent’s cunning, your minds may be led astray from your simple and pure devotion to Christ.

Here: 'Should be ruined/corrupted' (aorist passive subjunctive: a single event the Corinthians would suffer, described as a possibility). The verb was also used for seducing a virgin, which fits the betrothal picture in v. 2.

Ephesians 4:22 φθειρόμενον is being corrupted

to put off your former way of life, your old self, which is being corrupted by its deceitful desires;

Here: Present passive participle: 'being ruined', 'rotting', 'going to decay'. It describes an ongoing process, not a fixed state. The old human is decaying morally and heading for final ruin.

2 Peter 2:12 φθαρήσονται will be destroyed

These men are like irrational animals, creatures of instinct, born to be captured and destroyed. They blaspheme in matters they do not understand, and like such creatures, they too will be destroyed.

Here: 'They will be destroyed', a future passive pointing to the coming judgment (2:3, 2:9). The repetition of the root makes the penalty match the crime: corruption ends in destruction.

Jude 1:10 φθείρονται. they corrupt themselves.

These men, however, slander what they do not understand, and like irrational animals, they will be destroyed by the things they do instinctively.

Here: "They are being ruined/destroyed". The present tense describes something already under way. The word covers both moral decay and final destruction. Here the stress falls on destruction (compare "they perished" in v. 11), and the decay is how it happens.

Revelation 19:2 ἔφθειρεν was corrupting

For His judgments are true and just. He has judged the great prostitute who corrupted the earth with her immorality. He has avenged the blood of His servants that was poured out by her hand.”

Here: Imperfect tense: ongoing, habitual action. The word covers both moral corruption and physical ruin, and here both apply: she debased the world and wrecked it.