Where does “whar” come from?

whar (Middle English) comes from Old English hwǣr, from Old English -a, from Proto-Germanic -ō, from Proto-Germanic -ô, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “whar”, step by step

StepLanguageWordMeaning
1Old Englishhwǣrwhere
2Old English-aEnding forming adverbs; nominative masculine...
3Proto-Germanic-ōCreates feminine nouns from roots and stems
4Proto-Germanic-ô-ly; Forms agent nouns, often from the zero-grade...
5Proto-Indo-European-ōDerives nouns from roots
Every word from Proto-Indo-European -ō →Every word from Proto-Germanic -ô →Every word from Old English -a →