This word is from the Spanish ilicito.
i·lí·si·tó
illicit
In English, the adjective “illicit” means forbidden by law, rules, or custom. It is illegal, unlawful, banned or illegitimate.
MGA KAHULUGAN SA TAGALOG
ilísitó: hindi pinahihintulutan; hindi awtorisado
ilísitó: labág sa batás
