curtain
幮 centers on a fabric hanging used to cover or divide space: a curtain. Its meaning is narrow and concrete, referring to a cloth screen.
幮 combines 巾 (cloth) with 廚, which likely contributes the sound and may relate to a kitchen or covered space, suggesting a cloth covering or curtain. The exact historical development is uncertain.
The left side 巾 is a cloth, and the right side 廚 looks like a complex enclosed area. Imagine a large cloth hanging in front of a kitchen area to serve as a curtain.
For チュ, imagine a curtain made of chewy fabric: chewy -> チュ, and the curtain hangs heavily.