< Akk. pīḫatu, pāḫatu (Kaufman 1974, 82, EDA I 34). Constr. paḥat. The Massoretic vocalization of the Hebrew and Biblical Aramaic forms unambiguously points to a geminated guttural in the proto-form (*paḥḥ-at-), сf. Mankowski 2000, 128f.
Biblical Aramaic
plḥ - to pay reverence, to serve (a deity)
(HALOT 1957)
mәpōrāš - translated section by section
(HALOT 1960)
According to Zimmern 1920, 434, the widespread meaning “to understand; to give a clear decision, to explain” for *p-r-š in Aramaic (and Hebrew) may be due to the influence of Akk. parāsu