From kabar in its original sense; a sieve (as netted) -- sieve.
see HEBREW kabar
H3531. kebarah
כְּבָרָה noun feminine a sieve (a net-like implement), Amos 9:9 בַּכְּבָרָה יִנּוֺעַ כַּאֲשֶׁר as it (corn) is shaken (i.e. sifted) in a sieve. compare WetzstZPV xiv. 1 ff.