• 可能かのう — possible
• 可決かけつ — approval / passage (of a motion)
• 許可きょか — permission
• 不可ふか — not allowed / unacceptable
• 可視かし — visible
• 可愛いかわい — cute (phonetic use of 可)

Built from 口 (mouth) and a 丁-derived component, 可 historically signals verbal assent or decree. By extension it means “permitted,” “acceptable,” or “possible,” and frequently appears as a bound morpheme indicating feasibility or approval.

この案あんは 可決かけつされた。
The proposal was approved.

写真撮影しゃしんさつえいは 許可きょかが 必要ひつようです。
Photography requires permission.