Left: rice plant 禾, right: 舀 (hand reaching down 爫, mortar 臼)
It comes from the rice plant and the hand puts it (for processing) into the mortar: The rice.

Left: foot 足 (knee cap 口 and footprint 止), right: 舀 (hand reaching down 爫, mortar 臼)
(At the grape-stomping) With the feet from above into the mortar: to tread in.

Left: water 氵, right: 舀 (hand reaching down 爫, mortar 臼)
The water will do this, when a hand reaches down into a mortar (filled up to the brim): overflow.

Left: leather 韦 (Two layers 二 are separated with special sword 刀 to make leather), right: 舀 (hand reaching down 爫, mortar 臼)
Made of leather and something 爫 peeks out from the mortar-like: Bow case.