疏而不漏

疏 = ㇇ + 止 + 㐬 : Mnemonic symbol: a dredger. Sheldon Shrimp (shu) is operating a dredger (疏) in front of the space station (Ø1). First he clears the way of all the beaks (㇇) and pendant-cups (㐬), then he puts up a barrier (止) to stop the space-road from being obstructed again.

而 = 𦉫 + 丆 : A comb. Albert Einstein is getting ready to go out just inside the entrance of the space station. He put up some loud music on the stereo and tries to comb his hair with his comb and the help of a wind wheel.

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.

漏 = 氵 + 尸 + 雨 : Sir Lancelot (l) accidentally leaked (漏) a ghost (尸) from a water bottle (氵) in the outhouse's bathroom (ou4). Promptly the ghosts starts to have it rain (雨) all over the place to annoy the people.