noun
gusset; gore; overlapping front panel
Specifically the triangular or trapezoidal panel sewn into the front overlap of a kimono, below the collar, that allows the garment to wrap smoothly.
着物の衽がきれいに重なっている。
The gusset panels of the kimono overlap neatly.
この着物は衽の幅が広めに作られている。
This kimono is made with a slightly wider gusset.
The kanji 衽 and 袵 both represent the overlapping front panel of traditional clothing. The reading おくみ is a native Japanese word; its exact derivation is uncertain.