The kanji character 便 primarily conveys the idea of "convenience," "usefulness," "advantage," or "opportunity." It can also relate to "excrement" or "a matter" depending on the context. The core meaning revolves around things that are easy, suitable, or bring a benefit.

・On-yomi (音読み): ベン (ben) ・Kun-yomi (訓読み): たよ（り） (tayori - in the context of "letter" or "news")

⚫︎便利（べんり） Translation: convenient, handy. ⚫︎郵便（ゆうびん） Translation: mail, postal service. ⚫︎大便（だいべん） Translation: stool, feces (formal term).

The kanji 便 is a phono-semantic compound (形声文字). The left side is the radical 人（にんべん）, meaning "person". The right side is 更, which represents "change". It originally depicted a person changing their posture, leading to the sense of "convenience" as something that allows for an ease of change or movement. It later evolved to also encompass the ideas of "excrement" due to the association with bodily functions and change.