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treacherous

adjectiveattested in dialogue

  • //ˈtɹɛt͡ʃəɹəs//
  • //ˈtɹɛt͡ʃɹəs//

Exhibiting treachery.

adjective

  1. 1

    Exhibiting treachery.

    I see the wife misused by her husband, I see the treacherous seducer of young women, / I mark the ranklings of jealousy and unrequited love attempted to be hid […]

  2. 2

    Deceitful; inclined to betray.

  3. 3

    Unreliable; dangerous.

    a treacherous mountain trail

    Work on the muskeg resulted in the formation in the first instance, and later in lengths of newly-laid track disappearing without trace into the treacherous bog.

    […] they stood in the region of perpetual snow, amidst the glittering, treacherous glaciers and crevasses, with vast slippery-pathed precipices yawning round.

    There are many treacherous paths leading toward history’s realms of darkness, but when it comes to routes hacked out by imperialist powers in the Congo, we really do seem near darkness’s heart.

Etymology

From Old French trecheros, tricheros (“deceitful”), equivalent to treacher + -ous. See treacher.

Forms

comparative
more treacherous
superlative
most treacherous
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).