The kanji 入 primarily conveys the idea of "to enter," "to go in," or "to put in." It represents the action of moving something into a space or the state of being inside.

・On-yomi (音読み): nyuu入 (にゅう) ・Kun-yomi (訓読み): iru入 (いる) – to enter, hairu入 (はいる) – to go in, ireru入 (いれる) – to put in

⚫︎入学 (にゅうがく) Translation: Entrance to school ⚫︎入口 (いりぐち) Translation: Entrance; doorway ⚫︎入れる (いれる) Translation: To put in; to insert

The kanji 入 is a pictograph. It depicts something entering, such as a person entering a doorway. The shape itself visually represents an arrow going into an opening, further emphasizing the meaning of entry or insertion. Over time, the form became simplified to its present appearance.