Modifier: a word or phrase that describes or limits another word (noun, verb, adjective, etc.), such as adjectives, adverbs, or modifying clauses.
「赤い」は名詞を修飾する修飾語の一つだ。
'Akai' is one modifier that modifies a noun.
この文では「昨日」が時間を修飾する修飾語だ。
In this sentence, 'kinō' modifies the time.
日本語の修飾語は被修飾語の前に置かれることが多い。
Japanese modifiers often come before the word they modify.
文法の授業で修飾語と被修飾語の関係を学んだ。
I learned about modifier and modified-word relationships in grammar class.