belle-sœur

== French == === Etymology === Inherited from Middle French [Term?]. By surface analysis, belle- +‎ sœur. === Pronunciation === IPA(key): /bɛl.sœʁ/ === Noun === belle-sœur f (plural belles-sœurs) sister-in-law (wife's or husband's sister) sister-in-law (brother's or sister’s wife) step-sister, stepsister ==== Related terms ==== === Further reading === “belle-sœur”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012