treacherous

English

Etymology

From Old French trecheros, tricheros (“deceitful”). See treacher.

Pronunciation

• IPA^(key): /ˈtɹɛtʃəɹəs/, /ˈtɹɛtʃɹəs/

• Audio (US)

  (file)

Adjective

treacherous (comparative more treacherous, superlative most treacherous)

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

   a treacherous mountain trail

Antonyms

• (exhibiting treachery): loyal

Related terms

• treacher
• treachery
• trick
• trickster
• tricky

 

Translations

exhibiting treachery

• Czech: zrádný m
• Danish: forræderisk
• Dutch: verraderlijk (nl)
• Finnish: petollinen (fi)
• French: traître (fr)
• Georgian: მოღალატური (moɣalaṭuri), გამცემლური (gamcemluri)
• German: verräterisch
• Greek: προδοτικός (el) m (prodotikós), δόλιος (el) m (dólios)

  Ancient: δολερός (dolerós)

• Hungarian: áruló (hu)
• (deprecated template usage) {{trans-mid}}
• Irish: fealltach, cealgach
• Italian: traditore (it) m, sleale (it) m, infido (it) m
• Norwegian:

  Bokmål: forrædersk

• Polish: zdradziecki (pl)
• Portuguese: fementido (pt), traiçoeiro (pt) m
• Russian: вероло́мный (ru) (verolómnyj), преда́тельский (ru) (predátelʹskij)
• Spanish: traicionero (es) m

deceitful; inclined to betray

• Czech: zrádný m
• Finnish: petollinen (fi)
• French: traître (fr)
• Georgian: გამცემლური (gamcemluri)
• German: verräterisch
• (deprecated template usage) {{trans-mid}}
• Greek: δόλιος (el) m (dólios), επίβουλος (el) m (epívoulos)
• Hungarian: álnok (hu)
• Irish: fabhtach, braiteach
• Latin: perfidus
• Russian: вероло́мный (ru) (verolómnyj), кова́рный (ru) (kovárnyj)

unreliable; dangerous

• Czech: zrádný m
• Danish: forræderisk
• Finnish: petollinen (fi)
• French: traître (fr)
• Georgian: მუხანათური (muxanaturi)
• German: tückisch (de)
• (deprecated template usage) {{trans-mid}}
• Greek: ύπουλος (el) m (ýpoulos)
• Norwegian:

  Bokmål: forrædersk

• Russian: ненадёжный (ru) (nenadjóžnyj), непро́чный (ru) (nepróčnyj),
• Spanish: traicionero (es) m

Further reading

• “treacherous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “treacherous”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
• “treacherous”, in OneLook Dictionary Search.