肉毒杆菌毒素

• 肉(flesh; meat)ASSOCIATIVE

The character 肉 mimics a piece of meat with muscle fibers inside.

• 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.

• 木(tree; wood)RADICAL
• 干(dry branch; straight trunk)PHONO-SEMANTIC

A straight vertical wooden tree trunk like dried wood forms a handle or pole.

• 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.