Turkish honorary title formerly given to officers of high rank, 1640s, from Turkish pasha, also basha, from bash "head, chief" (no clear distinction between -b- and -p- in Turkish), from Old Persian pati- "master" (from PIE root *poti- "powerful; lord") + root of shah. Earlier in English as bashaw (1530s).
Proto-Indo-European root meaning "powerful; lord."
It forms all or part of: bashaw; compos mentis; despot; hospodar; host (n.1) "person who receives guests;" idempotent; impotent; omnipotent; pasha; plenipotentiary; posse; possess; possible; potence; potency; potent; potentate; potential; potentiate; potentiometer; power; totipotent.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit patih "master, husband;" Greek posis, Lithuanian patis "husband;" Latin potis "powerful, able, capable; possible."
"of or pertaining to Passover or Easter," early 15c., from Old French paschal (12c.) and directly from Late Latin paschalis, from pascha "Passover, Easter," from Greek pascha "Passover," from Aramaic (Semitic) pasha "pass over," corresponding to Hebrew pesah, from pasah "he passed over" (see Passover). Pasche was an early Middle English term for "Easter" (see Easter), and the older Dutch form of the word, Paas, was retained in New York.