tested as genuine

(Lat. ; v. , ii, 635); unalloyed, pure sincerus DCG a of unmixed substances; of abstract ideas; of ethical purity: , .† Phl 1:10 II Pe 3:1

oprecht

(originally: unmixed), pure, uncontaminated, sincere.

pure

judged by sunlight, i.e. tested as genuine (figuratively)

pure, sincere

εἰλικρινής, -ές, [in LXX: Wi 72^ kB * ;] unalloyed, pure (Lat. sincerus; see DCG, ii, 635a); (a) of unmixed substances; (b) of abstract ideas; (with) of ethical purity: Php.1:10, 2Pe.3:1.† SYN.: ἁγνός (which see), καθαρός, cf. Tr., Syn.: §lxxxv; DB, iv, 176a; Cremer, 378; Westc. on 1Jn.3:3. (AS)