An inflecting (declinable) word: a grammatical category of words that conjugate, such as verbs, adjectives, and adjectival verbs in Japanese.
日本語の文法では、『用言』は動詞や形容詞など活用する語を指す。
In Japanese grammar, 'yogen' refers to words that inflect, like verbs and adjectives.
『食べる』は代表的な用言の一つだ。
'Taberu' (to eat) is a typical example of an inflecting word.
初級の文法書でも用言と体言の違いはよく説明されている。
Even elementary grammar books often explain the difference between inflecting words (yogen) and nouns (taigen).