Synonyms & related words for treacherous

Find synonyms, related words, and the definition of treacherous — including perfidious, traitorous, deceitful, perilous, duplicitous, dangerous. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to treacherous

Explore words related to treacherous — words associated with it, words that go with it, and its nearest matches in meaning. Related words include treacherousness, perfidiously, devious, treacherously, treasonous, traitorously, treasonable, dastardly. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for treacherous

Common synonyms for treacherous include perfidious, traitorous, deceitful, perilous, duplicitous, dangerous, insidious, unreliable — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does treacherous come from?

The word treacherous breaks down into 2 roots of Old French and Latin origin: treacher, from Old French trichier (“to cheat, deceive”); and -ous, from Latin -osus (“full of”). Explore each root to see other English words built from the same source.