treacherously

Definition of Treacherously in English :

in a disloyal and faithless manner

Example Sentences:
'he behaved treacherously'
'his wife played him false'

WordNet Lexical Database for English. Princeton University. 2010.

Treacherously

adjective

1.

betraying or likely to betray faith or confidence

2.

unstable, unreliable, or dangerous

treacherous weather

treacherous ground

adjective

1.

characterized by treachery; traitorous; disloyal; perfidious

2.

giving a false appearance of safety or reliability; untrustworthy or insecure

treacherous rocks

adj.

1. Guilty of or characterized by betrayal of confidence or trust; perfidious.

2. Characterized by unforeseen or hidden hazards; dangerous or deceptive: treacherous waters; treacherous footing.