noun
knife pleat; accordion pleat
A type of pleat where all folds face the same direction, commonly used in skirts. Also called ナイフプリーツ.
See also: ナイフプリーツ
このスカートは車ひだになっている。
This skirt has knife pleats.
車ひだは一方向に折りたたまれている。
Knife pleats are folded in one direction.
ナイフプリーツ is the loanword equivalent, more common in fashion contexts. 車ひだ is the native Japanese term.
プリーツ is a general term for pleats, while 車ひだ specifically refers to unidirectional knife pleats.
Compound of 車 (wheel) and ひだ (pleat), likely from the resemblance of the pleats to the spokes of a wheel when laid flat.