Unlawful
From BiblePortal Wikipedia
Vine's Expository Dictionary of NT Words [1]
1: Ἀθέμιτος (Strong'S #111 — Adjective — athemitos — ath-em'-ee-tos )
a late form for athemistos (themis, "custom, right;" in classical Greek, "divine law"), "contrary to what is right," is rendered "an unlawful thing" (neuter) in Acts 10:28; in 1—Peter 4:3 , "abominable."
2—Peter 2:8Lawless.
King James Dictionary [2]
UNLAW'FUL, a. Not lawful contrary to law illegal not permitted by law.
Unlawful assembly, in law, the meeting of three or more persons to commit an unlawful act.
Webster's Dictionary [3]
(a.) Not lawful; contrary to law.