曲霉毒素

• 曰(mouth open; speak)RADICAL
• 丨丨(two vertical strokes indicating a curve)ASSOCIATIVE

The character 曲 shows a vessel's mouth with two curved walls, evoking the image of a bent and winding elbow.

• 母(mother; origin)RADICAL
• 龶(toxic grass; harmful plant)ASSOCIATIVE

A toxic plant grows from the earth like a mother nurturing life, but carries deadly poison.

• 糸(silk thread; filament)RADICAL
• 龶(coarse undyed thread bundle; top part of thread)ASSOCIATIVE

Raw silk that hasn't been dyed suggests the meaning of pure, simple, and basic.