Origin

This character combines the mouth radical 口 on the left with a sound component 关 on the right that hints at how to pronounce it. The mouth radical appears here not in its literal sense but as a general classifier for words related to speech and expression. The overall character developed to represent the idea of blossoming or flowering, where the "opening" sense of the mouth radical connects metaphorically to the opening of flowers. The right component 关 provided the sound guide, helping readers know approximately how to say the word without the shape itself directly picturing a flower.