adv.背叛地；靠不住地；危險地

The mountain road bends treacherously. 山路蜿蜒曲折。

Full of guile;deceitfully or treacherously cunning. 狡詐的詭計多端的，欺騙的或背信棄義的狡猾

"So take heed to your spirit, that you do not deal treacherously. 所以當謹守你們的心，不可行詭詐。這是萬軍之耶和華說的。

When you say that I murdered him treacherously and foully, you lie. 你說我狡猾而骯臟地謀殺了他時，你說的是謊言。

Marlowe was killed by a man whom he was treacherously trying to stab. 馬洛背信棄義正想捅死一人，結果被那人所殺。