Possible Results:
estaban cerniendo
-they/you were sifting
Imperfect progressive ellos/ellas/ustedes conjugation of cernir.
estaban cerniendo
-they/you were sifting
Imperfect progressive ellos/ellas/ustedes conjugation of cerner.

cernir

TRANSITIVE VERB
(to filter)-to sift
Synonyms for cernir
cerner
to sift
cribar
to sieve
tamizar
to sieve
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