English Dictionary

double-edged

adj

(not comparable) Of a blade, such as a sword or knife, sharp on both edges. / (comparable, figuratively) As dangerous for the user as the one it is used on.

Be careful when handling a double-edged knife.

意味（1）

(not comparable) Of a blade, such as a sword or knife, sharp on both edges.

意味（2）

(comparable, figuratively) As dangerous for the user as the one it is used on.

Slander is a double-edged weapon: you can hurt the reputation of another but it diminishes your own reputation that you debase yourself so much.