絨線

绒 = 戎 + 纟 : Rachel Rhinoceros (ru) wants to kill all the silk worms (纟) in the engine's kitchen ((e)ng2) to make a velvet (绒) vest for herself. She will need a lot of worms, so she prepared a whole firearm locker full of guns (戎) for her task.

线 = 戋 + 纟 : Mnemonic symbol: barbed wire.

线 = 戋 + 纟 : The silk worm wants to use the floating tank in the anthill's bathroom, but there's already Marie Curie inside—and she secured the tank by setting up barbed wire all around it.