許可
きょか · kyoka · JLPT N3 · noun
permission
🎫 許可 = allow (許) + can (可): you're allowed, so you can
許 is the kanji of 許す (yurusu, to permit or forgive); 可 is the can of 可能 (kanō, possible). Allow + can = permission. Common on signs as 許可なく, meaning without permission.
可 — mouth 口 + breath marker 丁 (modified)
可 originally depicted a mouth (口) with a curved stroke suggesting exhaled breath or speech, conveying approval or assent. From this came the meaning 'to permit' or 'can,' as granting permission was expressed verbally. Today it broadly means 'may,' 'can,' or 'approve.'