緯線

纬 = 纟 + 韦 : Willy Walrus (w) and the silk worm (纟) are surprised how cold it is in the Eiffel Tower (ei3). Not only Willy Walrus, but also the silk worm has to wear leather gloves (韦) to keep warm. It must be because of the high latitude (纬).

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.