Where does “tredjekvar” come from?

tredjekvar (Norwegian Nynorsk) comes from Norwegian Nynorsk tredje, from Old Norse þriði, from Proto-Germanic þridjô, from Proto-Indo-European tretyós, from Proto-Indo-European tr̥tyós, from Proto-Indo-European tréyes — three.

tredjekvar (Norwegian Nynorsk): every third

Definitions

every third

Ancestry of “tredjekvar”, step by step

tredjekvar traces back through two separate lines of ancestry.

via Norwegian Nynorsk tredje

Step	Language	Word	Meaning
1	Norwegian Nynorsk	tredje	third
2	Old Norse	þriði	third
3	Proto-Germanic	þridjô	third
4	Proto-Indo-European	tretyós	—
5	Proto-Indo-European	tr̥tyós	third
6	Proto-Indo-European	tréyes	three

via Norwegian Nynorsk kvar

Step	Language	Word	Meaning
1	Norwegian Nynorsk	kvar	where; each; every
2	Old Norse	hvar	where
3	Proto-Germanic	hwar	where, in what place
4	Proto-Germanic	hwēr	—
5	Proto-Indo-European	*kʷís	—

Every word from Proto-Indo-European tréyes →Every word from Proto-Indo-European tr̥tyós →Every word from Proto-Indo-European tretyós →