• 理解りかい — understanding
• 料理りょうり — cooking / cuisine
• 無理むり — unreasonable / impossible
• 理由りゆう — reason / cause

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理 is made of 玉 (jewel) and 里 (village). It originally referred to the process of polishing a jewel to reveal its natural beauty — later extending to mean understanding, logic, or reasoning.

理りを知しることは 大切たいせつです。
Understanding the reason is important.

無理むりをしないでください。
Please don’t overdo it.