毒刺

• 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.

• 朿(sharp thorn; prickle)PHONETIC
• 刂(knife (radical))RADICAL

Using a knife to stab into a sharp thorn—that is the action of piercing.