供认不讳

供 = 亻 + 共 : Gitta Giraffe ((e)ng1) is donating (供) blood in front of the engine ((e)ng1). Rosa Luxemburg (亻) draws the blood and the communist (共) stores it.

供 = 亻 + 共 : Gitta Giraffe (gu) is being interrogated by Rosa Luxemburg (亻) and the communist (共) In engine's bathroom ((e)ng4). Rosa and the communist want to squeeze a confession (供) out of Gitta, so they use the water boarding (供) technique.

认 = 人 + 讠 : Robinson Crusoe is lost in the encampment's bathroom. He doesn't know anyone, and he doesn't recognize the environment! At first, he turns to an advertising column, but it doesn't tell him anything useful. But fortunately, Neanderthal Man comes in, instantly recognizes Robinson Crusoe, and tells him where he is.

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

讳 = 讠 + 韦 : For Helga Horse (hu) soft leather gloves (韦) are a big taboo (讳), so she sets up an advertising column (讠) in the Eiffel Tower's bathroom (ei4) with an image of crossed-out leather gloves to tell everyone that they should not talk about it.