Phonosemantic compound. 亻 represents the meaning and 𠓥 represents the sound. Originally written as 𠓥, which depicted a hand holding a whip with the 丙 component. Based on the original meaning "whip a person", now written as 鞭. The current meaning is a phonetic loan.
convenience, ease; expedient; plain; informal; suitable; convenient; opportune; to urinate or defecate; equivalent to 就[jiù]: then; in that case; even if; soon afterwards