the.com/hemorrhoid

means A swollen, inflamed vein in or around the rectum or anus, usually caused by straining, pressure, or too much time spent sitting.

from From Greek 'haimorrhoides,' meaning 'veins liable to bleed' — a compound of 'haima' (blood) and 'rhoos' (flowing, from 'rhein,' to flow). Greek physicians used the term for bleeding veins generally, with the rectal kind becoming the main association over time. The word traveled through Latin into medical English largely intact, a rare case of an ailment keeping its ancient, clinically honest name instead of picking up a euphemism along the way.