tuck at the waist
A sewing technique where fabric is folded and stitched at the waistline to adjust the length or fit of a garment, commonly used in kimono or children's clothing.
Children's kimono are worn with a tuck at the waist to adjust for growth.
When you undo the waist tuck, the length of the kimono becomes longer.
Standard kanji spelling.
Alternate kanji spelling using 揚げ.
Compound of 腰 (こし, 'waist') and 上げ (あげ, 'raising' or 'tucking up').