English · Adjectives
treacherous
/ˈtretʃ.ər.əs/
[/ˈtretʃ.ər.əs/]
disloyal; dangerous
Advancedadjective
Definition
Betraying trust; or dangerously unstable and unpredictable.
Example
The treacherous mountain path had hidden ice that caused many accidents.
The treacherous mountain path had hidden ice that caused many accidents.
Etymology
From Old French 'trecheor' (deceiver), from 'trechier' (to cheat).
How & Where It’s Used
Describes both disloyal people and physically hazardous conditions.