沿線

沿 = 氵 + 几 + 口 : Maud Younger (y) hides a huge mandarin (口) under a table (几) in the anthill's kitchen (an2). She doesn't want anyone to touch it, so she marks the border (沿) of the forbidden zone using water bottles (氵).

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.