weeding out; elimination (e.g. of unneeded employees); culling; selection (e.g. natural selection)
reorganizing an industry or enterprise and weeding out redundant workers; readjustment and retrenchment
to separate and discard; to sieve and sort; to wash out (impurities, etc.)
sifting out; weeding out; selection; sorting
to shake; to jolt; to rock (cradle); to swing