Celibate
early 19th century (earlier (mid 17th century) as celibacy ): from French célibat or Latin caelibatus ‘unmarried state’ + -ate2.
wiktionary
From French célibat, from Latin caelibatus, perfect passive participle of caelibare, from caelebs(“unmarried”), compare German Zölibat.
etymonline
celibate (n.)
1610s, "state of celibacy" (especially as mandated to clergy in the Catholic church) from French célibat (16c.), from Latin caelibatus "state of being unmarried" (see celibacy). This was the only sense until early 19c.; the meaning "one who is sworn to celibacy" is from 1838. Other nouns in this sense were celibatarian, celibatist, celibian.
celibate (adj.)
"unmarried, sworn to remain single," 1825, probably from celibate (n.) or from celibacy on the model of privacy/private, etc.
