From Middle English syftynge; equivalent to sift +‎ -ing.

sifting

1. present participle and gerund of sift

sifting (plural siftings)

1. The act by which something is sifted.

   Synonyms: sieving, screening

   Coordinate terms: sorting, filtering

2. (in the plural) The material which falls through a sieve.

   Synonym: screenings

• fisting