热对流

• 执(hold; grasp)PHONETIC
• 灬(fire)RADICAL

Fire rising up from below an object being held creates a burning heat.

• 又(right hand)ASSOCIATIVE
• 寸(small unit of measurement; inch)RADICAL

Measuring carefully face-to-face with your hands inch by inch.

• 氵(water)RADICAL
• 㐬(swirling flow; whirlpool)PHONETIC

Water flowing in a whirlpool becomes a stream, which is the circulation of water.