From a (as a negative particle) and momos; unblemished (literally or figuratively) -- without blame (blemish, fault, spot), faultless, unblamable.
see GREEK a
see GREEK momos
STRONGS NT 299: ἄμωμοςἄμωμος, (μῶμος), without blemish, free from faultiness, as a victim without spot or blemish: 1 Peter 1:19 (Leviticus 22:21); Hebrews 9:14; in both places allusion is made to the sinless life of Christ. Ethically, without blemish, faultless, unblamable: Ephesians 1:4; Ephesians 5:27; Colossians 1:22; Philippians 2:15 L T Tr WH; Jude 1:24; Revelation 14:5. (Often in the Sept.; (Hesiod, Simonides, Jamblichus), Herodotus 2, 177; Aeschylus Pers. 185; Theocritus, 18, 25.) (Synonym: see Trench, § ciii.; Tittmann 1:29f.)