The story
- Proto-Indo-European · derived from*plu-
- Ancient Greek · derived fromπυέλος“oblong trough”
- English todaypyelitis
From Ancient Greek πυέλος (puélos, “oblong trough”) + -itis, from Proto-Indo-European *plu- (zero-grade form of *plew-) + *-elos. By surface analysis, pyel- + -itis.
Etymology from Wiktionary, CC BY-SA 4.0.