入る
Reading: いる
Meaning: to enter, to advance into (formal/literary)
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예문
They were words that deeply entered my heart.
사용법 노트
Formal/literary variant of はいる (to enter). Commonly used in set phrases like 気に入る (to like), 悦に入る (to be delighted), etc. Also used to indicate deep engagement with an action when following verb stems.