Where does “tunnur” come from?

tunnur (Faroese) comes 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.

tunnur (Faroese): thin

Definitions

thin

Ancestry of “tunnur”, step by step

tunnur traces back through two separate lines of ancestry.

via Old Norse þunnr

Step	Language	Word	Meaning
1	Old Norse	þunnr	thin
2	Proto-Germanic	þunnuz	thin
3	Proto-Indo-European	ténh₂us	thin
4	Proto-Indo-European	tenh₂-	to stretch, to extend
5	Proto-Indo-European	ten-	to stretch, to extend

via Persian تنور

Step	Language	Word	Meaning
1	Persian	تنور	tandoor; oven; furnace
2	Pahlavi	tanūr	—
3	Akkadian	𒋾𒂟	—

Every word from Proto-Indo-European ten- →Every word from Proto-Indo-European tenh₂- →Every word from Proto-Indo-European ténh₂us →