Cf. pašīšūtu ‘activity of a pašīšu’ (CAD P 255, AHw. 845).
The relationship between Akk. pašīšu and Sum. PA₄.ŠEŠ (a priest) is unclear. The Akk. word is often thought to be derived from
pašāšu ‘to anoint’ (lit. ‘anointed’) and regarded as the source of Sum. PA₄.ŠEŠ (see Sommerfeld 2006:57 for references). However, the direction of borrowing may, in fact, be the other way round (Krispijn 2004, Sommerfeld 2006:57, with earlier literature). In this case, the Sumerian lexeme is to be understood as consisting of PA₄ ‘elder’ and ŠEŠ ‘brother’.