Greek ῥήγνυμι (rhēgnymi), from ῥῆξις (rhēxis)
“bursting,” “rupture,” “tearing” — Noun-forming compound suffix — “bursting or rupture of (a tissue or organ)”
The word entered English in the 1800s as rrhexis (noun), borrowed from Modern Latin rrhexis, from Greek ῥξις (rhēxis) — literally “a bursting” (from rhēgnymi “to burst, to break”). The double r in the Latinized form represents the Greek rough breathing (ῥ). The root rhēgnymi (“to burst, to break”) connects -rrhexis to the entire rupture and tearing suffixes: vesical rrhexis (vesic- + rrhexis → bursting of the bladder), intestinal rrhexis (entero- + rrhexis → bursting of the intestine), and uterine rrhexis (uter- + rrhexis → bursting of the uterus). The compound suffix-rrhexis is productive in surgery, obstetrics, and pathology: e.g., vesical rrhexis, intestinal rrhexis, uterine rrhexis, splenic rrhexis, and gastric rrhexis.