随信附上

• 阝(earthen mound; village; hamlet)RADICAL
• 迶(follow; accompany (in sound))PHONETIC

Following someone else through villages and neighborhoods is the meaning of the character 随.

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

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

• 阝(earthen mound; village; hamlet)RADICAL
• 付(hand over; deliver)PHONETIC

Attaching something to a place is like handing an object to the neighboring village next door.

• ⺊(dot above; high position)ASSOCIATIVE
• 一(standard baseline; norm)ASSOCIATIVE

A dot mark sitting above a horizontal line represents the meaning 'above'.