legitimises
le-git-i-mis-es
verb
To make something acceptable, valid, or lawful in the eyes of others.
"The new policy legitimises their controversial actions."
Thesaurus
Synonyms: legalise, legitimise, legitimate, decriminalise, decriminalize, legalize, legitimize, legitimatise, legitimatize
Antonyms: criminalise, criminalize, illegalise, illegalize, outlaw