also: りょうばのけん
expression, noun
double-edged sword
Idiomatic expression meaning something that has both advantages and disadvantages, or can be both beneficial and harmful.
インターネットは諸刃の剣だ。便利な反面、危険も伴う。
The internet is a double-edged sword. While convenient, it also comes with dangers.
彼の才能
His talent was a double-edged sword, bringing success but also causing friction with those around him.