「Silky threads」and「movement of head in crotch, spread feet with prick」to mean「needle and thread used to pull two sides of bodily tissue together by slowly goring each side and forcing the sides to meet」as in SUTURES pulling sliced flesh and skin back together, and also the obvious SEWING, STITCHES of cloth materials.
　Right element as an independent glyph today is comprised of「movement of descending slowly upon a prick」referring to a「tryst, rendezvous for the purpose of engaging in clandestine sexual intercourse」a thought that also entails the slow meeting and goring upon a horn by two sides of human tissue. Note that the「prick, tally」element includes「many repeated strokes」on what appears to be a thin horn or needle.「Ejaculations and tryst」refer to a NARROW SLIT in clothing, likely placed strategically in both partner's clothing, such as a modern-day zippered fly in the front of a man's trousers and split-crotch panties for the partner in a dress or skirt, allowing for quick rear entry and an even faster getaway if the need be.
　Glyph is used in Japan to depict STUFFED ANIMALS, perhaps since the object resembles meat, flesh, and skin that is SUTURED together at the seams, and because if the object is split open, whitish blobs of fluff normally begin to slip out of the narrow slit, another result the same as a「rendezvous, lover's tryst」since the slit-proffering partner seldom has any opportunity to wash up immediately.
　EMBROIDERY as a decorated cloth variously mentioned in Chinese glyphs normally has to do with the multi-colored thread-like emissions that stain surrounding cloths with interesting shapes and patterns that are discharged whilst reaming a urethra with a bougie, another result of quick trysts, with a needle in actions that resemble a sewing machine.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: seam; crack; narrow slit; to sew; to stitch
Japanese: embroidery, sewing, to sew, to stitch, to weave one's way, needlework
Unihan extended: sew, mend
EDRDG: sew; stitch; embroider

Used within names (nanori)
ぬい