Incerno, incernis, incréui, incrêtum, pen. prod. incérnere. Cato. To sift in: to trie by sifting.
Lewis and Short: Latin dictionary
in-cerno, ĕre, v. a., to sift upon a thing, to cover or bestrew with sifting; to sift, scatter with a sieve: terram cribro, Cato, R. R. 48, 2; Col. 5, 6, 6: super fricaturam incernatur marmor, Vitr. 7, 1: incretum ( = per incerniculum sive cribrum inspersum),
sifted in
, Hor. S. 2, 4, 75 Orell. (but in Plin. 37, 6, 23, 87, the correct read. is redimitum; v. Sillig. ad h. l.).