crude manufacturing; shoddy production
Refers to the act of making something in a rough, low-quality, or careless manner. Often used in compounds like 粗製乱造 (そせいらんぞう, 'mass production of inferior goods').
Shoddy mass production damages market trust.
この製品は粗製のため、すぐに壊れてしまった。
This product broke quickly because of its crude manufacture.
粗製 describes something made crudely or carelessly, the opposite of the careful purification or meticulous manufacture implied by 精製.
Compound of 粗 (そ, 'coarse' or 'rough') and 製 (せい, 'manufacture' or 'make'). The exact historical derivation is uncertain, but the combination straightforwardly conveys 'crude production'.