동인이 · 동인을
driving force, motive, cause
Example
기술 발전은 사회 변화의 중요한 동인입니다.
Technological progress is an important driving force of social change.
Word parts
동 move+인 cause
Literally 'moving cause'.
Good to know
Don't confuse with the homonym 동인 'fellow members', as in 동인지 'coterie magazine'.
Related words