1. to enter; to go in
E.g.: 入社 (joining a company), 進入 (entry, intrusion)
2. admission; entrance
E.g.: 入試 (entrance exam)
3. to put in; to introduce
E.g.: 入念 (careful, attentive), 導入 (introduction, bringing in)
4. to be needed; to cost
E.g.: 入費 (expenses, cost), 入用 (need, necessity)
5. entering tone
E.g.: 入声 (entering tone)
