vertical stroke (in Chinese characters), referred to as 豎筆|竖笔[shu4 bi3]
Mnemonic symbol: a dinosaur bone. Sheldon Shrimp (shu) found a gorgeous dinosaur bone (丨) in the space station's bathroom (Ø4) and is cracking it open to eat its bone marrow.
Yu the Great (yu) is selling flutes (一) in front of the elevator (e1). He has a whole box (囗) of them, and he's advertising them by using a microphone (曰).
Characters with 曱 as component
曱
is not used as a component in another character.