刻骨銘心

刻 = 亥 + 刂 : Mnemonic symbol: an engraver.

The boar cannot believe it when it meets Karl Marx in the elevator's bathroom! Bewildered it asks for an autograph but has nothing except for a kitchen knife and an engraver. It takes Karl Marx a quarter of an hour to engrave his message in the kitchen knife: "Dear boar, keep on fighting capitalism! Yours, Karl."

骨 = 冎 + 月 : Gitta Giraffe (gu) is performing some dark rites in the space station (Ø3). She 3D printed a whole skeleton (骨) including skull (冎) and is trying to make it come alive under a full moon (月), citing from the Necronomicon.

铭 = 名 + 钅 : Before she visits engine, in the kitchen ((e)ng2) Marilyn Monroe (mi) engraves (铭) her epitaph (铭) on her name badge (名) using a golden harpoon (钅) just in case anything happens.

心 = 乚 + 丶 : Marie Curie (xi) uses a shovel (乚) to dig a hole in front of the encampment ((e)n1). She wants to bury her heart (心). To the side are three petal leaves (丶), with which she wants to cover it afterwards.