What's the "een" in Halloween?
1530s, a back formation from procreation or else from Latin procreatus, past participle of procreare "to beget, bring forth" (see procreation). Related: Procreated; procreating.
procreate pro·cre·ate (prō'krē-āt')v. pro·cre·at·ed, pro·cre·at·ing, pro·cre·ates
To beget and conceive offspring; to reproduce.
To produce or create; originate.