Sift (verb)

1. To put (a powdery or granular substance) through a sieve in order to remove lumps or to separate the fine from the coarse particles.
2. To examine or consider (something) carefully and in detail.

Origin:

Late middle english: from old french sifter, from sif "sieve", of germanic origin; related to sieve.

Examples:

1. Sift the flour and baking powder together.
2. She sifted through the pile of letters.
3. They sifted through the evidence.
4. He sifted through the ashes of the fire.
5. I sifted through all the information I had collected.