legitimate
le-git-i-mate
verb
To make something legal or acceptable; to justify or validate.
"They tried to legitimate their actions."
adjective
Conforming to rules or laws; valid, justifiable, and acceptable.
"That's a legitimate question, so please ask."
Thesaurus
Synonyms: constituted, established, valid, logical, legalise, legitimise, decriminalise, decriminalize, legalize, legitimize, legitimatise, legitimatize
Antonyms: criminalise, criminalize, illegalise, illegalize, illegitimate, outlaw