German word wo comes from Proto-Germanic *hwaz, Proto-Indo-European *weh₁ros (True.), Proto-Indo-European *wēr-, Proto-Indo-European *kʷi-, Proto-Germanic - r
| Dictionary entry | Language | Definition |
|---|---|---|
| *hwaz | Proto-Germanic (gem-pro) | (interrogative) who, what. (interrogative, in dative) whom. (interrogative, in genitive) whose. (interrogative, in instrumental) with whom, with what, how, in what way. |
| *weh₁ros | Proto-Indo-European (ine) | True. |
| *wēr- | Proto-Indo-European (ine) | |
| *kʷi- | Proto-Indo-European (ine) | |
| - r | Proto-Germanic (gem-pro) | |
| *wērijaz | Proto-Germanic (gem-pro) | |
| *hwēr | Proto-Germanic (gem-pro) | |
| hwār | Old High German (goh) | |
| wære | Middle High German (gmh) | |
| wo | German (de) | (indefinite, colloquial) somewhere. (interrogative) where. (relative) where. (relative, somewhat, informal) when (colloquial) when (relative, dialectal, nonstandard) who, whom, which, that. |