dagger|daggers

这把匕首看起来很危险。

This ___dagger looks dangerous.

自从那次争吵后，他们之间的关系一直剑拔弩张。

Ever since the quarrel, they have been at ___daggers drawn with each other.

他的背叛像一把匕首刺进她的心。

His betrayal was like a ___dagger piercing her heart.