KanjiJLPT N1
Horizontal

horizontal, woof, left & right, (parallels of) latitude, prediction

Mnemonic

grandma throws on her leather jacket and lies horizontal across the loom. She becomes the weft thread herself, stretching side to side like a latitude line. The leather jacket creaks as grandma holds perfectly horizontal, arms reaching east to west.
Additional thoughts
Picture grandma physically becoming a horizontal weft thread on the loom, her leather jacket making her stiff enough to stay perfectly straight—like a line of latitude circling the globe.
Quick recall
grandma in a leather jacket lies horizontal across the loom like a latitude line.

Details

The keyword for 緯 is horizontal. This kanji refers to the horizontal threads in weaving, known as the weft or woof, which run side to side across the vertical warp threads on a loom. By extension, it conveys the concept of anything running in a lateral or east-west direction. It is most commonly encountered in the word for latitude, the horizontal lines that circle the globe parallel to the equator.
On'yomi
Kun'yomi
よこいと、ぬき

Used in vocab