Boyd’s Bible Dictionary:
Ancient sieves, or sifters, were crudely made of rushes, though the Gauls are credited with their manufacture from horsehair
They were used for separating the flour from the bran, or broken kernels, and what was left in the sieve was thrown back into the mill to be reground (Isa. 30:28).
Strong’s Dictionary of Hebrew Words:
Meaning:
from 3527 in its original sense; a sieve (as netted)