Abbott-Smith Manual Greek Lexicon
ἀ-δόκιμος (G96)
8 ἀ-δόκιμος , -ον, [in LXX: Pr 25:4 , Is 1:22 ( סִיג )*;] of things (prop. of metals: LXX, Pr 25:4 , Is 1:22 ), not standing the test , rejected : γῆ , He 6:8 . Of persons, rejected after testing , reprobate : Ro 1:28 , I Co 9:27 , II Co 13:5-7 , II Ti 3:8 , Tit 1:16 (Cremer, 212).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain