1 Peter 3:4

ὁ κρυπτὸς ἄνθρωπος, cf. Romans 7:22 τὸν ἔσω ἄνθρωπον.

ἄνθρωπος does not mean man as opposed to woman but is a neutral term, like homo. Here it means the inner character, cf. τὸν καινὸν ἄνθρωπον … τὸν παλαιὸν ἄνθρωπον, Ephesians 4:22-24.

ἐν τῷ�. Probably a neuter adjective used as a substantive = the incorruptible apparel.

ἡσύχιος is used in Isaiah 66:2 of “a contrite spirit.” Here it means tranquil as opposed to restless, fussy, or perturbed. Only in 1 Timothy 2:2, a tranquil (ἤρεμον) and quiet (ᾑσύχιον) life. The substantive ἡσυχία is used of silence in Acts 22:2; 1 Timothy 2:11, and of quietness in 2 Thessalonians 3:12 as opposed to restless excitement.

Bengel distinguishes πραΰς as meaning “qui non turbat,” ἡσύχιος “qui turbas aliorum, superiorum, inferiorum, aequalium fert placide.” Also πραΰς, he says, refers to feelings, ἡσύχιος to words, look, or conduct.

πραΰς = mild, gentle, meek as opposed to self-seeking and aggressive, cf. Matthew 5:5; Matthew 11:29; Matthew 21:5.

πολυτελές. Such an ornament is like a costly jewel in God’s estimation, cf. Mark 14:3; 1 Timothy 2:9. In the LXX. it is used of gold and precious stones.