Added 10 October 2026 insincerely adverb Categories: Describing WordsObscure Words adverb ! Definition from Wiktionary (CC BY-SA). More about insincerely at Wordnik → Where our words come from → In an insincere manner. Related Words: uningenuouslyinsipidlyinsensatelysincerelyinsinuatinglyuninsightfullyinanelyunauthenticallyingenuouslyunderhandedlyunsympathetically Back to today's word