Períthesis (περίθεσις) means the act of wearing or putting on adornment. From peritithēmi (to place around). Appears once in 1 Peter.
First Peter 3:3-4: 'Your beauty should not come from outward adornment (períthesis)... but from your inner self, the unfading beauty of a gentle and quiet spirit, which is of great worth in God's sight.' Peter establishes a hierarchy of beauty: external adornment is temporary; inner character is 'of great worth' and 'unfading.' This applies beyond gender — all believers are called to prioritize character over appearance, integrity over impression management. God looks at the heart (1 Samuel 16:7).