수술이 · 수술을
surgery, operation
Example
할아버지의 수술이 잘 끝나서 가족들이 기뻐했어요.
Grandpa's surgery went well, so the family was happy.
Word parts
수 hand+술 technique
Literally 'hand technique.'
Good to know
Patients 수술을 받다, 'receive surgery,' while doctors 수술하다, 'operate.'