þrír tigir

== Old Norse == === Alternative forms === þrjátigi === Etymology === From Proto-Germanic *þrīz tigiwiz (“thirty”). === Numeral === þrír tigir m pl (cardinal number) thirty [with genitive ‘of something’] ==== Declension ==== ==== Descendants ==== Icelandic: þrjátíu Faroese: tríati Norwegian: tretti; (dialectal) treti, triti → Danish: treti, tretti (Norway) Norwegian Bokmål: tretti Elfdalian: tretti Old Swedish: þrǣtighi Swedish: trettio Old Danish: thretiughæ, thretiughu Danish: tredive, tredveNorwegian Bokmål: tredve→ Faroese: tretivu Gutnish: tretti