Extended Strong's Greek Lexicon (Abbott-Smith based)
failing
Usage: ἀ-δόκιμος, -ον, [in LXX: Pro.25:4, Isa.1:22 (סִיג) * ;] __1. of things (prop. of metals: LXX, ll. with), not standing the test, rejected: γῆ, Heb.6:8. __2. Of persons, rejected after testing, reprobate: Rom.1:28, 1Co.9:27, 2Co.13:5-7, 2Ti.3:8, Tit.1:16 (Cremer, 212). † (AS)