treacherously

A storm blew in, drenching the stadium and making the shot put ring treacherously slippery.

The playing surface was treacherously slippy with snow piled up around up around the touchlines and conditions barely playable.

“The Ukrainian military couldn’t penetrate our army’s defenses, but the top commander hit us in the back, treacherously and cowardly beheading the army at this most difficult moment.”

He said Friday he was ready for a compromise but “they have treacherously cheated us.”

In a statement late Friday, he said he was ready to find a compromise but “they have treacherously cheated us.”