"contrary to law, illegal," c. 1300, from un- (1) "not" + lawful. Unlawful assembly is recorded in statutes from late 15c. Related: Unlawfully. Old English had a noun unlagu ("unlaw") "illegal action, abuse of law."
unlawful measures
unlawful money
unlawful hunters
unlawful love
unlade
unladen
unladylike
unlamented
unlatch
unlawful
unleaded
unlearn
unlearned
unleash
unleavened