Sino-Korean word from 用言. From Japanese yōgen.
용언 • (yong-eon) (hanja 用言)
Words in the 용언 (yong-eon) class are those that can be conjugated and used as Korean predicates. The class includes 동사 (dongsa, “verbs”), 형용사 (hyeong-yongsa, “adjectives”), the copula 이다 (ida), and its antonym 아니다 (anida).