Sordid

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late Middle English (as a medical term in the sense ‘purulent’): from French sordide or Latin sordidus, from sordere ‘be dirty’. The current senses date from the early 17th century.

wiktionary

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Latin sordidus, from sordēre(“be dirty”).

etymonline

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sordid (adj.)

early 15c., "festering," from Latin sordidus "dirty, filthy, foul, vile, mean, base," from sordere "be dirty, be shabby," related to sordes "dirt, filth," from PIE *swrd-e-, from root *swordo- "black, dirty" (source also of Old English sweart "black"). Sense of "foul, low, mean" first recorded 1610s. Related: Sordidly; sordidness.