居高不下

居 = 古 + 尸 : Mnemonic symbol: 寄居蟹, ji4ju1xie4, a hermite crab.

A ghost is haunting Zeus and the hermite crab in front of the space station. While the hermite crab is able to retreat into the cloister it uses as shell, Zeus can only float away in horror.

高 = 亠 + 冋 + 口 : A skyscraper.

高 = 亠 + 冋 + 口 : Just in front of the aorta, a huge skyscraper has been erected. It's an important building, so there's a control checkpoint at the entrance, and Guy Fawkes has been hired to stand guard. To make him look more dangerous, he wears a beret. However there's no-one to check, so Guy Fawkes is bored and eats a mandarin.

高 = 亠 + 冋 + 口 : A skyscraper.

高 = 亠 + 冋 + 口 : Just in front of the aorta, a huge skyscraper has been erected. It's an important building, so there's a control checkpoint at the entrance, and Guy Fawkes has been hired to stand guard. To make him look more dangerous, he wears a beret. However there's no-one to check, so Guy Fawkes is bored and eats a mandarin.

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.

下 = 一 + 卜 : Mnemonic symbol: from the up/down logic, and a little bit the shape of the character, a ladder.

Xi Shi (xi) is on a retreat in the ashram. Using a voodoo staff (卜), she divined that next (下) week she'll have to play the flute (一) sixteen hours per day. Because she hates playing the flute, she climbs over the ashram's bathroom (a4) wall using a ladder (下) to escape.