Semitic Etymological Database
the root *ˁṭp is related to the present (CDG 75) Proto-MSA *γfṣ̂ might also be related
The Akk. variant form with ḫ- may also suggest γ-. The ESA and Jib. forms, however, clearly point to ˁ-.
reflexes are applied throughout Semitic to designate 'spring' as source of water, s. Kogan 2011: 192