| lawful | (adjective) conformable to or allowed by law | - |
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| (adjective) authorized, sanctioned by, or in accordance with law | Synonyms: legitimate, licit |
| (adjective) having a legally established claim | Synonyms: rightful, true |
| (adjective) according to custom or rule or natural law | Synonyms: rule-governed |
| unlawful | (adjective) contrary to or prohibited by or defiant of law | - |
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| (adjective) contrary to or forbidden by law | Synonyms: illegitimate, illicit, outlaw, outlawed |
| (adjective) having no legally established claim | Synonyms: wrongful |
| (adjective) not morally right or permissible | - |
| (adjective) not conforming to legality, moral law, or social convention | Synonyms: improper, unconventional |