"lawful" in the adjective sense
1. lawful
conformable to or allowed by law
"lawful methods of dissent"
2. lawful, rule-governed
according to custom or rule or natural law
3. true, lawful, rightful
having a legally established claim
"the legitimate heir"
"the true and lawful king"
4. lawful, legitimate, licit
authorized, sanctioned by, or in accordance with law
"a legitimate government"
Source: WordNet® (An amazing lexical database of English)
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