Frayed

google

ref

late Middle English: from Old French freiier, from Latin fricare ‘to rub’.

wiktionary

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From English fray, from Old French froiier(“to rub against, scrape; thrust against”), from Latin fricare(“to rub, rub down”).

etymonline

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frayed (adj.)

"worn by rubbing," 1814, past-participle adjective from fray (v.).