挂号信

• 扌(hand)RADICAL
• 圭(jade tablet; ceremonial jade tablet)PHONO-SEMANTIC

A hand holding a jade card hooked up is the motion of hanging or suspending.

• 口(mouth; opening)RADICAL
• 丂(labored breathing; breathlessness)PHONETIC

A mouth releasing strong breath to call out a name or command.

• 亻(person; human)RADICAL
• 言(speech; words)ASSOCIATIVE

A person who keeps their word true is the one worthy of trust.