þeisti

== Old Norse == === Etymology === From Proto-Germanic *þaistô, of unknown further origin. === Noun === þeisti m (genitive þeista, plural þeistar) black guillemot, tystie (Cepphus grylle) ==== Declension ==== ==== Descendants ==== Icelandic: teista Faroese: teisti Norn: tåisti → English: tystie → Scottish Gaelic: taibhse Norwegian: teiste, teist → German: Teiste Swedish: tejst, teiste, teste Danish: tejst, tejste Norwegian Bokmål: teist, teiste