Longman Dictionary of Contemporary English homepage

Date: 1100-1200
Language: Old French
Origin: trecherie, from trechier, trichier; TRICK1

treachery

 noun
     
treach‧e‧ry plural treacheries
1 [uncountable] behaviour in which someone is not loyal to a person who trusts them, especially when this behaviour helps that person's enemies:
the treachery of those who plotted against the king
2 [countable usually plural] a disloyal action against someone who trusts you
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary