Seamstress

google

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late 16th century: from archaic seamster, sempster ‘tailor, seamstress’ + -ess1.

wiktionary

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From seamster +‎ -ess

etymonline

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seamstress (n.)

1640s, with -ess + seamster (also sempster), from Old English seamestre "sewer, tailor, person whose work is sewing," from seam. Originally indicating a woman, but after a while the fem. ending -estre no longer was felt as such and a new one added.