去氧核糖核酸

• 土(earth; soil; land)ASSOCIATIVE
• 厶(private; personal)PHONETIC

Leaving your own plot of land is what the character Khứ means (go, depart).

• 气(air; vapor)RADICAL
• 羊(goat)PHONETIC

Gas with a tone like 'dương' is oxygen—the gas that sustains all living things.

• 木(tree; wood)RADICAL
• 亥(pig (12th zodiac sign))PHONETIC

The kernel of a tree fruit (木) sounds like the character for pig (亥).

• 米(grain; seed)RADICAL
• 唐(large; empty (homophone of sugar))PHONO-SEMANTIC

Sugar is a sweet substance extracted from grain, with sound based on Tang.

• 酉(wine vessel; ferment)RADICAL
• 夋(slow manner; leisurely pace)PHONETIC

Fermenting alcohol produces sourness, which is exactly the character for sour.