curtain, screen
帷 centers on a hanging cloth that separates or conceals: a curtain or screen used to partition space or block view.
帷 combines 巾 (cloth) with 隹, which likely contributes a phonetic element. The character originally referred to a cloth hanging or curtain.
The left side 巾 is a cloth, and the right side 隹 looks like a bird. Imagine a large cloth curtain with a bird pattern hanging to screen off a room.
For イ, picture an eagle (イーグル) perched on the curtain rod: eagle -> イ, and the curtain hangs below.
light, thin, single-layer kimono (esp. from hemp or raw silk, for summer use)
curtain
headquarters; general staff
close adviser; close advisor
direct appeal to the throne by the military
curtain; field staff headquarters; secret meeting place
single-layer absorbent bathrobe (worn during or after a bath)
white kimono in which dead person is dressed
chain mail (armor, armour)