English Explanatory Dictionary

treacherous

English dictionary entry

Meanings

adj
  1. Exhibiting treachery.
  2. Deceitful; inclined to betray.
  3. Unreliable; dangerous.

Pronunciation

/ˈtɹɛt͡ʃəɹəs/ /ˈtɹɛt͡ʃɹəs/ en-us-treacherous.ogg

Word forms

treacherous more treacherous most treacherous

Etymology

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

Synonyms

booky dastardly disleal disloyal double-crossing double-dealing double-faced double-hearted doublehearted faithless false falseheart false-hearted guiled guileful hollow-hearted illoyal infidelitous insidious Judaslike Judasly nonfaithful perfidious proditorious proditory Punic ratlike recreant renegade reptilian reptitious swike traitorish traitorlike traitorly traitorous traitorsome treacherous treachersome trothless unfaithful unleal unloyal unsteadfast untrue viperish viperous beguiling deceitful deceptious deceptive deceptory fallacious fraudful fraudulent hazardous perilous unsound dangerous dangersome

Antonyms

faithful fidelitous leal loyal steadfast true untraitorous untreacherous

Related words

treacher treachery trick trickster tricky betray betrayal betrayer
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