Where does “Nullvektor” come from?

Nullvektor (German) comes from German Null, from German Nulla, from Italian nulla, from Latin nūlla, from Latin nūllus, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

Ancestry of “Nullvektor”, step by step

Nullvektor traces back through two separate lines of ancestry.

via German Null

StepLanguageWordMeaning
1GermanNullzero; failure, loser
2GermanNulla—
3Italiannullafeminine singular of nullo; nothing, anything;...
4Latinnūllano
5Latinnūllusno one, none, not any, nothing
6Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
7Proto-Indo-Europeanóynosone; single

via German Vektor

StepLanguageWordMeaning
1GermanVektorvector
2Latinvectorbearer, carrier; passenger; first-person singular...
3Latin-tor-er
4Proto-Italic-tōrForms agent nouns to verb stems
5Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
6Proto-Indo-European-tor-s—
Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Latin nūllus →