First Known Use: 13th century
Dictionary
treachery
noun treach·ery \-rē\
: harmful things that are done usually secretly to a friend, your own country, etc.
: an act of harming someone who trusts you
plural treach·er·ies
Full Definition of TREACHERY
1
: violation of allegiance or of faith and confidence : treason
2
: an act of perfidy or treason
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Origin of TREACHERY
Middle English trecherie, from Anglo-French, from trecher, tricher to deceive, from Vulgar Latin *triccare — more at trick
Related to TREACHERY
- Synonyms
- backstabbing, business, disloyalty, double cross, faithlessness, falseness, falsity, infidelity, perfidy, sellout, betrayal, treason, two-timing, unfaithfulness
- Antonyms
- allegiance, devotion, faithfulness, fealty, fidelity, loyalty, staunchness, steadfastness
Rhymes with TREACHERY
TREACHERY Defined for Kids
treachery
noun treach·ery \ˈtre-chə-rē\
plural treach·er·ies
Definition of TREACHERY for Kids
1
: the behavior of a person who betrays trust or faith <a tale of treachery and revenge>
2
: an act or instance of betraying trust or faith <She was hurt by her friend's treacheries.>
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