• 土(earth; soil; land)
• 荅(small grass; herb (for sound))

A tower is built from earth and stone, with a sound close to the character for answer.

• 罒(net; mesh (variant form))
• 夕(evening; dusk)

Spreading a net at dusk to catch birds is the original meaning of the character.

• 片(wood chip; flat board)
• 卑(low; base; mean)

A signboard is a flat piece of wood inscribed with the name of a lowly person presented to a superior.

• 土(earth; soil; land)
• 荅(small grass; herb (for sound))

A tower is built from earth and stone, with a sound close to the character for answer.

• 罒(net; mesh (variant form))
• 夕(evening; dusk)

Spreading a net at dusk to catch birds is the original meaning of the character.

• 片(wood chip; flat board)
• 卑(low; base; mean)

A signboard is a flat piece of wood inscribed with the name of a lowly person presented to a superior.