winnowing
箕 centers on the action of winnowing: separating grain from chaff using a shallow basket-like tool. The kanji refers to that winnowing process or the tool itself.
箕 combines 竹 (bamboo) with 其, which likely contributes the sound and originally depicted a winnowing basket. Together they suggest a bamboo winnowing tool.
Bamboo 竹 is woven into a basket 其 to toss grain in the air: the chaff blows away and the grain stays. That is winnowing.
For キ, imagine a key-shaped winnowing basket: key -> キ, and you use it to separate grain from chaff.
winnow; winnowing basket; winnowing fan
Chinese "winnowing basket" constellation (one of the 28 mansions)
winnower; grain fan
penny wise and pound foolish
triplewart seadevil (Cryptopsaras couesii)
goblin shark (Mitsukurina owstoni)
old woman ghost from the Kanto region
Chinese "winnowing basket" constellation (one of the 28 mansions)
sitting with one's legs outstretched