How do you say system in Korean?
— 체계 (chegye); 제도 (jedo); 계 (물리학)

Specialized synonyms for system in Korean
body몸 (mom)
calendar달력 (dallyeok); 력 (-ryeok)
government정부 (jeongbu)
organism생물 (saengmul); 유기체 (yougiche)
skeleton해골 (haegol)