Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

treachery

play
noun treach·ery \-rē\

Simple Definition of treachery

  • : harmful things that are done usually secretly to a friend, your own country, etc.

  • : an act of harming someone who trusts you

Source: Merriam-Webster's Learner's Dictionary

Full Definition of treachery

plural

treacheries

  1. 1 :  violation of allegiance or of faith and confidence :  treason

  2. 2 :  an act of perfidy or treason

Examples of treachery in a sentence

  1. a tale of treachery and revenge

  2. <was furious that she revealed his secret and never forgave her for the treachery>



Origin and Etymology of treachery

Middle English trecherie, from Anglo-French, from trecher, tricher to deceive, from Vulgar Latin *triccare — more at trick


First Known Use: 13th century


TREACHERY Defined for Kids

treachery

play
noun treach·ery \ˈtre-chə-rē\

Definition of treachery for Students

plural

treacheries

  1. 1 :  the behavior of a person who betrays trust or faith <a tale of treachery and revenge>

  2. 2 :  an act or instance of betraying trust or faith <She was hurt by her friend's treacheries.>





Seen and Heard

What made you want to look up treachery? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a very small amount

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

accomodate acommadate acommodate accommodate
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ