饱和脂肪酸

• 飠(eat; food)RADICAL
• 包(wrap; package)PHONO-SEMANTIC

Being full is when your stomach is wrapped and filled with food inside.

• 禾(rice plant)ASSOCIATIVE
• 口(mouth; door)RADICAL

A mouth singing songs beside ripe rice fields creates harmonious peace.

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

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