장기가 · 장기를
(internal) organ
Example
그는 사고로 세상을 떠나며 장기를 기증했어요.
He passed away in an accident and donated his organs.
Word parts
장 viscera+기 organ
Literally 'internal-body instrument'.
Good to know
Homonym warning: 장기 also means long-term (長期) and a chess-like board game (將棋).
Related words