treacherous
//ˈtrɛtʃ.ər.əs//
Adjective
treacherousCanonical form
more treacherousComparative
most treacherousSuperlative
1
Guilty of or involving betrayal or deception; not to be trusted.
He turned out to be a treacherous friend who revealed all my secrets.
2
(of ground, water, conditions, etc.) Presenting hidden or unpredictable dangers; hazardous.
The mountain path becomes treacherous in winter due to ice and snow.