Pass through sieve is a process that involves separating materials of different sizes. It is done by passing the material through a sieve or SCREEN. The two words used to describe this process are SIFT (4 letters) and SCREEN (6 letters). SIFT is the process of separating fine particles from coarser ones by shaking them through a sieve. Screening is the process of separating particles by size, shape, and other characteristics using a mesh or perforated sheet.