to observe or inspect carefully or critically
to interrogate
to determine the aptitude, skills or qualifications of someone by subjecting them to an examination
to check the health or condition of something or someone
[+object] (archaic or old-fashioned) To scrutinise (someone or something) carefully so as to find the truth.
To sieve or strain (something).
To separate or scatter (things) as if by sieving.
[+ through (object)] To carefully go through a set of objects, or a collection of information, in order to find something.