Arabic

fyḫ - to void excrement with an emission of wind (BK 2 652, Lane 2469)

PWS
*pḫ/ḥ - to breathe, blow, exhale (smell) (SED I No. 54ᵥ)
Reconstructed as a biconsonantal root with various ways of triconsonantization (insertion of medial ­w­, doubling of the second radical, etc.).