Where does “muthir” come from?

muthir (Middle English) comes from Old English mōdor, from Old Frisian mōder, from Proto-Germanic mōdēr, from Proto-Indo-European méh₂tēr — mother.

Ancestry of “muthir”, step by step

StepLanguageWordMeaning
1Old Englishmōdormother
2Old Frisianmōder—
3Proto-Germanicmōdērmother
4Proto-Indo-Europeanméh₂tērmother
Every word from Proto-Indo-European méh₂tēr →Every word from Proto-Germanic mōdēr →Every word from Old Frisian mōder →