Where does “tjugoåttonde” come from?

tjugoåttonde (Swedish) comes from Swedish tjugo, from Old Swedish tiughu, from Old Norse tuttugu, from Proto-Germanic twai tigiwiz, from Proto-Germanic twai, from Proto-Indo-European dwóh₁ — two.

tjugoåttonde (Swedish): twenty-eighth

Definitions

twenty-eighth

Ancestry of “tjugoåttonde”, step by step

tjugoåttonde traces back through two separate lines of ancestry.

via Swedish tjugo

Step	Language	Word	Meaning
1	Swedish	tjugo	twenty
2	Old Swedish	tiughu	twenty
3	Old Norse	tuttugu	twenty
4	Proto-Germanic	twai tigiwiz	twenty
5	Proto-Germanic	twai	two
6	Proto-Indo-European	dwóh₁	two

via Swedish åttonde

Step	Language	Word	Meaning
1	Swedish	åttonde	eighth
2	Norwegian Nynorsk	åttande	eighth
3	Old Norse	áttandi	—
4	Proto-Germanic	ahtudô	eighth

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Germanic twai →Every word from Proto-Germanic twai tigiwiz →