Where does “vaxtahækkun” come from?

vaxtahækkun (Icelandic) comes from Icelandic hækkun, from Icelandic -un, from Icelandic -an, from Old Norse -an, from Proto-Germanic -ōniz, from Proto-Germanic -niz, from Proto-Indo-European -nis.

Ancestry of “vaxtahækkun”, step by step

vaxtahækkun traces back through two separate lines of ancestry.

via Icelandic hækkun

StepLanguageWordMeaning
1Icelandichækkunheightening, raising, elevation; rise, increase
2Icelandic-un"Forms nouns from verbs denoting the action or...
3Icelandic-an
4Old Norse-anUsed to derive nouns from class 2 weak verbs;...
5Proto-Germanic-ōnizForms abstract nouns from weak class 2 verbs
6Proto-Germanic-nizForms abstract nouns from verbal roots and stems
7Proto-Indo-European-nis

via Icelandic vöxtur

StepLanguageWordMeaning
1Icelandicvöxturgrowth, increase; interest
2Old Norsevǫxtrgrowth, increase
3Proto-Germanicwahstuzsize, growth
4Indo-European*h₂weks-
Every word from Proto-Indo-European -nisEvery word from Icelandic -unEvery word from Old Norse -an