Where does “attogramme” come from?

attogramme (English) comes from English atto-, from Danish atten, from Old Norse áttján, from Proto-Germanic ahtōutehun, from Proto-Germanic ahtōu, from Proto-Indo-European oḱtṓw, from Proto-Indo-European aḱ- — sharp, pointed; sharp, pointed, edgy; sharp,...

Ancestry of “attogramme”, step by step

StepLanguageWordMeaning
1Englishatto-API; In the International System of Units and...
2Danishatteneighteen
3Old Norseáttjáneighteen
4Proto-Germanicahtōutehuneighteen
5Proto-Germanicahtōueight
6Proto-Indo-Europeanoḱtṓweight
7Proto-Indo-Europeanaḱ-sharp, pointed; sharp, pointed, edgy; sharp,...
Every word from Proto-Indo-European aḱ- →Every word from Proto-Indo-European oḱtṓw →Every word from Proto-Germanic ahtōu →