treacherously

In a treacherous manner.

Japanese Meaning

裏切り的に、危険や不誠実を伴う様子で

The guide treacherously led the hikers away from the safe trail into the fog.

ガイドは裏切るようにハイカーたちを安全な道から離れて霧の中へ導いた。

Sense（1）

In a treacherous manner.

The former spy behaved treacherously.

more treacherously

（ comparative ）

most treacherously

（ superlative ）