Definition of treacherous
- a treacherous memory
- treacherous quicksand
a treacherous act of betrayal
They were not prepared to hike over such treacherous terrain.
The snow made their hike all the more treacherous.
Discussions about money can lead couples into treacherous territory.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'treacherous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: not able to be trusted : showing that someone cannot be trusted
: very dangerous and difficult to deal with
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