倍塔

• 亻(person; man; people)RADICAL
• 咅(spray; spurt)PHONETIC

A person multiplied many times over, like blowing up the quantity to grow repeatedly.

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

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