Added 9 October 2026 sneaky /ˈsniːki/ adjective Categories: Describing WordsRare Words In Latin: perfidus Wiktionary adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about sneaky at Wordnik → Where our words come from → Marked by deception. achieved success in business only by underhand methods Marked by quiet and caution and secrecy; taking pains to avoid being observed. a furtive manner Related Words: furtiveunderhandunderhandedsurreptitiousstealthysneakskulkinglurkingcorruptcrookedconcealedinsidious Back to today's word