와신상담in English:to endure hardships for revenge

Examples
with 와신상담.

• 그는 와신상담의 정신으로 경쟁자를 이기기 위해 모든 것을 견뎌냈다.geuneun washinsangdam-ui jeongsin-euro gyeongjaengja-reul igigi wihae modeun geoseul gyeondyeonaetda.He endured everything with the spirit of 와신상담 to defeat his competitor.