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Showing results for treacherous. Search instead for treacheries.
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.

He has investigated the agendas of powerful fossil fuel billionaires, delved into epic feuds pitting some of the world's largest energy companies against each other, and revealed how drillers navigate a treacherous political landscape.

From The Wall Street Journal • Mar. 2, 2026

A 70-year-old man died Tuesday after falling from a cliff along California’s treacherous Devil’s Slide, an oceanside stretch in Pacifica known for steep terrain that has led to several fatal accidents.

From Los Angeles Times • Feb. 25, 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

Woods will also face the mental pressure of long summit pushes, particularly navigating the treacherous icefall between Base Camp and Camp 1.

From BBC • Feb. 12, 2026

The rope lattice of the ratlines narrows as I near the crow’s nest, making the climb feel increasingly treacherous.

From "Challenger Deep" by Neal Shusterman