double-edged

double-edged (comparative more double-edged, superlative most double-edged)

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

• single-edged

• double-edged sword

• cut both ways