To Sift

1. To sieve or strain (something).
2. To separate or scatter (things) as if by sieving.
3. To examine (something) carefully.
   1. [+object] (archaic or old-fashioned) To scrutinise (someone or something) carefully so as to find the truth.
   2. + *[through* (object)] To carefully go through a set of objects, or a collection of information, in order to find something.
4. (computing, dated) To move data records up in memory to make space to insert further records.