Abbott-Smith Manual Greek Lexicon
θρῆσκος (G2357)
1 * θρῆσκος ( -κός , WH), -ου, ὁ religious , careful of the outward forms of divine service (see previous word): Ja 1:26 .† SYN. : εὐσεβής , θεοσεβής , δεισιδαίμων (v. Tr., Syn. , § xlviii).
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain