Where does “tunnland” come from?

tunnland (English) comes from Swedish tunnland, from Swedish tunna, from Swedish tunn, from Old Norse þunnr, from Proto-Germanic þunnuz, from Proto-Indo-European ténh₂us, from Proto-Indo-European tenh₂-, from Proto-Indo-European ten- — to stretch, to extend.

Ancestry of “tunnland”, step by step

StepLanguageWordMeaning
1Swedishtunnlandbarrel of land (old Scandinavian unit of arable land area, approximately half a hectare, or around 1.2 acres for a Swedish barrel of land)
2Swedishtunnato make or become thin or sparse, to disperse, to...
3Swedishtunnthin; having small thickness; scanty, thin;...
4Old Norseþunnrthin
5Proto-Germanicþunnuzthin
6Proto-Indo-Europeanténh₂usthin
7Proto-Indo-Europeantenh₂-to stretch, to extend
8Proto-Indo-Europeanten-to stretch, to extend
Every word from Proto-Indo-European ten-Every word from Proto-Indo-European tenh₂-Every word from Proto-Indo-European ténh₂us