View synonyms for treacherously


[ trech-er-uhs-lee ]


  1. in a way characterized by faithlessness or betrayal; traitorously:

    Darius of Persia was treacherously wounded by two of his own officers.

  2. in a way that is deceptive, untrustworthy, or unreliable:

    This peak looks treacherously easy, but it has seen a recurrence of avalanches.

  3. in a way or to a degree that is dangerous; hazardously:

    He refused to go faster than 25 mph on the treacherously winding and narrow Wildwood Road.

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Other Words From

  • un·treach·er·ous·ly adverb

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Word History and Origins

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Example Sentences

With temperatures near freezing most of the day and some roads treacherous, police asked residents to stay home.

Traveling from one river valley to the next, Rachael has to cross a mountain pass that’s positively treacherous in the winter, then follow a narrow, winding road through a canyon.

Ancient road networks crisscross the lava flows’ treacherous terrain, and pottery pieces and charcoal have been found in and around cave entrances.

A self-professed fitness enthusiast, Amos took special pleasure in the rucks, a run in full military gear over treacherous terrain.

The greens, meanwhile, will maintain their usual slickness thanks to the underground Sub-Air system that removes excess moisture to help keep them in treacherous shape all year.

Observers believe she sees support for the Rohingya as going treacherously against the tide of popular opinion.

Trying to build a one-state reality in the name of “inalienable rights and realpolitik” is treacherously dishonest.

But they, like Adam, have transgressed the covenant, there have they dealt treacherously against me.

But Tryphon, when he was upon a journey with the young king, Antiochus, treacherously slew him.

Duddingston was treacherously shot at and wounded; he and his men were set on shore, and the schooner was burnt.

I had you at my mercy when I was treacherously struck down from behind.

Thuringia was invaded, her king defeated, and after a while treacherously slain.