An Etymological Dictionary of the German Language/Räder

by Friedrich Kluge

Räder, m., also Rädel, ‘sieve,’ allied to MidHG. rëden, OHG. rëdan, ‘to sift, winnow.’ The Teut. stem is probably hreþ-, hence the word may be related to Lith. krétalas, ‘sieve,’ kreczù, ‘to shake’; allied also perhaps to Lat. cer-nere, ‘to sift’ (creteus, ‘sifted’).