三酸甘油酯

• 一(one; horizontal stroke)ASSOCIATIVE
• 二(two (pictograph – two horizontal strokes))ASSOCIATIVE

Three horizontal strokes stacked on top of each other symbolize the number three.

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

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

• 氵(water; liquid)RADICAL
• 由(from; due to; oil (phonetic))PHONO-SEMANTIC

Oil is a liquid that flows from a natural source.