縫い込み is read as ぬいこみ (nuikomi) and means tuck.
ぬいこみ
nuikomi
ぬいこむ
to sew in
ぬいぐるみ
stuffed toy
ぬいめ
seam
ぬう
to weave one's way (e.g. through a crowd)
ほうせい
sewing (by machine)
ぬい
embroidery
ぬいばり
sewing needle
ぬいつける
to sew on
ぬいしろをわる
to stop an inside seam rolling about
ほうせんかく
raphe nuclei
ほうごう
sewing together
ぬいかた
sewing method