idiom
Pyrrhic victory
大きな代償を払って得た価値のない勝利。
Meaning
A victory won at too great a cost to be worthwhile.
Example
Winning the lawsuit was a **Pyrrhic victory** since it drained all their finances.
訴訟に勝ったのは**ピュロスの勝利**であり、全ての財産を失った。