역학 • (yeokhak) (hanja 力學)
역 (yeok) + 학 (hak). Sino-Korean word from 疫 (“epidemic”) + 學 (“study”).
역학 • (yeokhak) (hanja 疫學)
역 (yeok) + 학 (hak). Sino-Korean word from 力學, from 力 (“force”) + 學 (“study”). Borrowing from Japanese 力学 (rikigaku).