tvítugur

Icelandic

Etymology

From tví- (“two”) +‎ tugur (“group of ten”).

Adjective

tvítugur (not comparable)

1. twenty years old; twenty, vicenarian
2. twenty fathoms tall/deep/long/across/etc. (which is twenty of a unit)

Usage notes

• Also used as a noun in the neuter singular, eg. vera um tvítugt (“be about twenty”), hafa tvo um tvítugt (“be twenty-two”).

Declension

positive forms of tvítugur

strong declension (indefinite)	singular	masculine	feminine	neuter
	nominative	tvítugur	tvítug	tvítugt
	accusative	tvítugan	tvítuga
	dative	tvítugum	tvítugri	tvítugu
	genitive	tvítugs	tvítugrar	tvítugs
	plural	masculine	feminine	neuter
	nominative	tvítugir	tvítugar	tvítug
	accusative	tvítuga
	dative	tvítugum
	genitive	tvítugra
weak declension (definite)	singular	masculine	feminine	neuter
	nominative	tvítugi	tvítuga	tvítuga
	acc/dat/gen	tvítuga	tvítugu
	plural (all-case)	tvítugu

Related terms

• tugur
  • þrítugur
  • fertugur
  • fimmtugur
  • sextugur
  • sjötugur
  • nítugur

See also

• ræður
  • sjöræður
  • áttræður
  • níræður
  • tíræður
  • tólfræður

References

• Ásgeir Blöndal Magnússon (1989) Íslensk orðsifjabók, Reykjavík: Árni Magnússon Institute for Icelandic Studies, →ISBN (Available at Málið.is under the “Eldri orðabækur” tab.)
• Kristín Bjarnadóttir, editor (2002–2025), “tvítugur”, in Beygingarlýsing íslensks nútímamáls [The Database of Modern Icelandic Inflection] (in Icelandic), Reykjavík: The Árni Magnússon Institute for Icelandic Studies
• Mörður Árnason (2019) Íslensk orðabók, 5th edition, Reykjavík: Forlagið
• “tvítugur” in the Dictionary of Modern Icelandic (in Icelandic) and ISLEX (in the Nordic languages)