PS

*npy - to sieve (Fronzaroli 1971: 618, 633, 640; Kogan 2011: 242)

Akkadian
napû - to sift (CAD N₁ 327, AHw. 742)
Hebrew
nāpā - sieve (HALOT 708)
Hebrew
npy - (pi.) to fan, winnow, sift (Jastrow 923)
pB.
Jewish Palestinian Aramaic
npy - to fan, winnow, sift (DJPA 355)
Syriac
nfātā - dirt (LSyr. 435, SL 938)
Arabic
nafiyy- - kind of sieve made of palm leaves (TA 40 119)
perhaps related
Geez
nafaya - to fan, winnow, sift (CDG 390)