FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

athesmos ἄθεσμος — ath'-es-mos — from 1 (as a negative particle) and a derivative of 5087 (in the sense of enacting); lawless, i.e. (by implication) criminal:--wicked.

see GREEK for 1

see GREEK for 5087