Where does “ōk” come from?

ōk (Old Dutch) comes from Proto-West Germanic *auk, from Proto-Germanic auk, from Proto-Indo-European h₂ewg-, from Proto-Indo-European h₂weg-, from Proto-Indo-European h₂ug-.

Ancestry of “ōk”, step by step

StepLanguageWordMeaning
1Proto-West Germanic*aukalso, too
2Proto-Germanicaukalso, too; furthermore, in addition; and
3Proto-Indo-Europeanh₂ewg-to increase, to enlarge
4Proto-Indo-Europeanh₂weg-to increase, to enlarge
5Proto-Indo-Europeanh₂ug-—

Words derived from “ōk”

Every word from Proto-Indo-European h₂ug- →Every word from Proto-Indo-European h₂weg- →Every word from Proto-Indo-European h₂ewg- →