C2idiom
Pyrrhic victory
피루스의 승리 (너무 큰 희생을 치른 승리)
A victory that costs so much to achieve that it is essentially a defeat
예문
Winning the lawsuit was a Pyrrhic victory — the legal fees wiped out everything they had gained.
Beating the competitor on price was a Pyrrhic victory that nearly bankrupted the company.