treacherously

These are treacherously attacked one night by Finn's men, 1073.

Yet of this, my only remaining comfort, I was treacherously and cruelly deprived.

I will inform that lovely wife how treacherously you have acted.

He jumped backward, exclaiming that I had wounded him treacherously.

I had you at my mercy when I was treacherously struck down from behind.

Thuringia was invaded, her king defeated, and after a while treacherously slain.

He hired two villains who treacherously put the count to death.

They fell upon us suddenly and treacherously, and butchered every one of my comrades.

One of the shallops had been, as it was believed, treacherously destroyed.

They thought that they were treacherously fired upon, and fled precipitately.