treacherously

UK
/ˈtrɛtʃ.ər.əs.li/
US
/ˈtrɛtʃ.ər.əs.li/

Translations

treacherouslyadverb
UK
/ˈtrɛtʃ.ər.əs.li/
US
/ˈtrɛtʃ.ər.əs.li/
He treacherously betrayed his friends.
Он предательски предал своих друзей.

Definitions

treacherouslyadverb
In a manner that is dangerously unstable or unpredictable.
The path was treacherously icy, making it difficult to walk without slipping.
In a way that involves betrayal or deception.
He treacherously revealed his friend's secret to the entire group.