tailor; seamstress; dressmaker
Refers to a professional who makes, alters, or repairs clothing. The term is gender-neutral in Japanese, though English glosses may carry gender connotations.
She is a skilled dressmaker.
My grandfather was a well-known tailor in town.
洋裁師 specifically refers to a tailor or dressmaker of Western-style clothing, whereas 裁縫師 can encompass both Western and Japanese clothing.
Compound of 裁縫 (saihō, 'sewing') and 師 (shi, 'master, expert'). The exact historical derivation is uncertain, but the word follows a common pattern for professional titles.