縫ぬい込こむ

ぬ

い

こ

む

Meanings

1

godan verb (-mu), transitive verb

sew in; stitch in

To sew something into a garment or fabric, such as a pocket, lining, or patch.

縫ぬう
縫う is the general verb for 'to sew', while 縫い込む specifically means to sew something into something else.
縫ぬい付つける
縫い付ける means to sew something onto a surface, whereas 縫い込む implies sewing something inside or into a seam.

Compound of 縫い (the continuative form of 縫う 'to sew') + 込む ('to go into; to do thoroughly'). The combination yields 'to sew in'.