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Showing results for treacherous. Search instead for Treacherous/5.
Definitions

treacherous

[trech-er-uhs] / ˈtrɛtʃ ər əs /
ADJECTIVE
dishonest, disloyal
Synonyms
STRONGEST
slippery tricky unreliable
WEAK
betraying catchy deceitful deceptive double-crossing double-dealing duplicitous faithless false false-hearted fly-by-night insidious misleading perfidious recreant shifty slick snake in the grass traitorous treasonable two-faced two-timing undependable unfaithful unloyal untrue untrustworthy
Antonyms
STRONGEST
honest reliable
WEAK
forthright harmless loyal true untreacherous
ADJECTIVE
dangerous
Synonyms
STRONGEST
difficult hazardous icy ominous perilous precarious risky slippery ticklish tricky unreliable unsafe unstable
WEAK
alarming chancy deceptive dissembled faulty hairy insecure jeopardous menacing misleading shaky undependable unhealthy unsound wicked
Antonyms
STRONGEST
certain definite easy friendly honest protected reliable safe secure stable straightforward strong sure uncomplicated
WEAK
forthright harmless loyal true untreacherous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Answering that question is more treacherous than usual.

From The Wall Street Journal • Apr. 1, 2026

The National Weather Service said blizzard conditions would "quickly materialize" from Maryland up to southeastern New England, making travel "extremely treacherous."

From Barron's • Feb. 22, 2026

Conditions on Wednesday remained dangerous, multiple officials said, with Woo describing the climate as "treacherous".

From BBC • Feb. 18, 2026

The downhill course is steep and sometimes icy, often more treacherous than a typical slope.

From Los Angeles Times • Feb. 13, 2026

They probably didn’t tell me because I’m named after him and it would be a curse to be named after a treacherous son.

From "Everything Sad Is Untrue" by Daniel Nayeri

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.