Treacherous | Mean of treacherous in English Dictionary

/ˈtrɛtʃərəs/

• not able to be trusted
1. a treacherous ally/enemy
2. a treacherous act of betrayal
3. treacherous misdeeds
• very dangerous and difficult to deal with
1. sailing through treacherous waters
2. They were not prepared to hike over such treacherous terrain.
3. The snow made their hike all the more treacherous.
4. Discussions about money can lead couples into treacherous territory.