Betrayal
Treachery
noun
From the backside you cut someone. Wow. What a jerk. What betrayal and treachery.
This word is 裏 and 切る's readings, put together.
彼女の裏切りを知ったとき、目の前が真っ暗になった。
When I found out about her betrayal, everything went dark before my eyes.
あの優しさは、裏切りを隠すための仮面だったのかと思うと、胸がギュッとしめつけられた。
Thinking how that kindness was actually just a mask to hide their betrayal made my chest tighten with pain.
天使のような笑顔の裏に、裏切りがひそんでいたなんて、誰が想像できただろう。
Who could've ever imagined that betrayal was lurking behind that angelic smile?