G0802
ἀσύνθετος
untrustworthy
ἀ-σύν-θετος, -ον (συντίθεμαι ν. M, Pr., 222; MM, see word), [in LXX: Jer.3:7-11 (בָּגַד)* ;] false to engagements, not keeping covenant, faithless (MM, see word): Rom.1:31.† (AS)
Full Thayer's lexicon entry
ἀσύνθετος — asýnthetos
ἀσύνθετος, ἀσυνθετον,
1. uncompounded, simple (Plato, Aristotle, others.).
2. (συντίθεμαι to covenant), covenant-breaking, faithless: Rom 1:31 (so in Jer 3:8; Jer 3:11; Demosthenes de falsa leg., p. 383, 6; cf. Pape and Passow under the word; ἀσυνθέτειν to be faithless (Psa 72:15; 2Es 10:2; Neh 1:8, etc.); ἀσυνθεσία transgression, 1Ch 9:1 (Ald., Complutensian; 2Es 9:2; 2Es 9:4; Jer 3:7); ἐυσυνθέτειν to keep faith; (cf. Trench, § lii.)).
1 occurrence