Hemorrhoid

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late Middle English: via Old French and Latin from Greek haimorrhoides (phlebes) ‘bleeding (veins)’, from haima ‘blood’ + an element related to rhein ‘to flow’.

wiktionary

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From Middle English emerowdes, emeroides, emeroydez, from Old French emorroides, from Latin haemorrhoidae, [1] from Ancient Greek αἱμορροΐς(haimorrhoḯs), a feminine adjective from αἱμόρροος(haimórrhoos, “flowing with blood”), from αἷμα(haîma, “blood”) and the root of ῥέω(rhéō, “flow”). [2] Doublet of emerod.

etymonline

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hemorrhoid (n.)

see hemorrhoids.