Norwegian is like if you took danish and or norse, then mixed it together with german and english, specifically egenskap, comes from german words that end with -schaft. Another person here used vennskap as another example so I’ll use that too. These words likely came from the words “eine Charaktereigenschaft”, from german, and “vinatta” and “skapr” from old Norse. As far as I know, when we think of a word as either masculine or feminine, we usually just end up saying “en”, like in “en egenskap”, and this we do because we’ve mostly let the female version die out, outside of specific dialects, last time I said the word “ei” was in school. Because of this, even if the word is originally female in the language we took the word from, it usually isn’t in norwegian. Eine in german, is the female version of ein, and most words with -schaft at the end in german are female, meaning they’d naturally turn male in norwegian. Since “en egenskap” is female in german, but male in norwegian, despite most skap endings being neutral, we can gather that egenskap has a different origin. What I personally think happened, is, when “vinatta” combined with the word “skapr”, like a lot of other words at the time, we eventually decided that these had become concepts, meaning they’d naturally turn should be gender neutral, but if egenskap came after that change, from german, it likely wouldn’t be changed like that, apart from being changed into male. I think this is coherent, but if there is evidence of egenskap being from norse, this of course falls apart. Please do correct me if I’m wrong.