Origin

The character combines a roof radical (广) that suggests a building or structure with the component 兼, which serves as a sound hint for pronunciation rather than contributing to the meaning. The roof radical frames a sense of containment or boundary, which connects to meanings like "charge" or "account" — things that are kept within limits or boundaries. Over time, this visual idea of something bounded or delimited came to extend to related concepts like "bargain" (a limited transaction), "reason" (a bounded explanation), and "suspicion" (a limited or uncertain claim). The sound component 兼 helps readers know roughly how to pronounce the character without directly shaping its meaning.