twifeald sweg

== Old English == === Etymology === Calque of Latin diphthongus (literally “twofold-sound”) === Pronunciation === IPA(key): /ˈtwiˌfæ͜ɑld sweːj/, [ˈtwiˌfæ͜ɑɫd sweːj] === Noun === twifeald swēġ m diphthong c. 995, Ælfric, Excerptiones de Arte Grammatica Anglice