treachery

C2 Topic:Actions & Processes

US /ˈtɹɛt͡ʃəɹi/ See IPA manual

Freq #13144

Meanings

1

noun
The act of betraying someone who trusts you.

His treachery was revealed when the documents proved he had been spying for the rival firm.
2

noun
Disloyalty to one's country; treason.

The general was executed for treachery against the crown.

Thesaurus

Synonyms

1 noun · the act of betraying... betrayal perfidydouble-dealingstab in the back

2 noun · disloyalty to one's... treason perfidy

Word family

Forms treacheries

Derived forms treacher treacherous

Related forms trick trickery trickster tricky

Simplified etymology

Treachery entered English in the Middle English period. It comes from Old French trichier, “to deceive or cheat,” which also gave English trick.

Etymology

From Middle English trecherie, from Old French tricherie, trecherie, from tricher, trichier (“to cheat”).

trecherie Middle English tricherie Old French

View etymology graph ->

Topics

Actions & Processes Word Formation & Derivatives

External links

# treachery

**Type:** Word
**Level:** C2
**Part of speech:** noun
**IPA (US):** /ˈtɹɛt͡ʃəɹi/
**Frequency rank:** 13144

## Meanings
1. The act of betraying someone who trusts you.
2. Disloyalty to one's country; treason.

## Examples
- His treachery was revealed when the documents proved he had been spying for the rival firm.
- The general was executed for treachery against the crown.

## Derived Forms
- treacher
- treacherous

## Related Forms
- trick
- trickery
- trickster
- tricky

## Roots and Affixes
- Root: trecherie
- Root: tricherie

## Etymology
From Middle English trecherie, from Old French tricherie, trecherie, from tricher, trichier (“to cheat”).

## AI Etymology
Treachery is from Middle English trecherie, from Old French tricherie, trecherie, from tricher, trichier (“to cheat”). Important recorded forms include trecherie (Middle English) and tricherie (Old French). Current senses include the act of betraying someone who trusts you and disloyalty to one's country; treason. The wider family includes derived forms such as treacher and treacherous; related words such as trick, trickery, trickster, and tricky.

## Topics
- Actions & Processes
- Word Formation & Derivatives

markdown