beau-frère

== French == === Etymology === Inherited from Middle French beau frere, beau-frere, beaufrere, beau-frère, beauffrère, biau frere. By surface analysis, beau- +‎ frère. === Pronunciation === IPA(key): /bo.fʁɛʁ/ === Noun === beau-frère m (plural beaux-frères, feminine belle-sœur) brother-in-law (brother of one's wife) brother-in-law (brother of one's husband) brother-in-law (husband of one's sister) brother-in-law (husband of one's brother) ==== Related terms ==== === Further reading === “beau-frère”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012