Where does “burmen” come from?

burmen (Cornish) comes from Cornish burm, from Old English Beorma, from Proto-West Germanic bermō, from Proto-Germanic bermô, from Proto-Indo-European bʰér-mō ~ bʰr̥-mnés, from Proto-Indo-European bʰer- — to bear, carry.

Ancestry of “burmen”, step by step

StepLanguageWordMeaning
1Cornishburmyeast
2Old EnglishBeormayeast, leaven
3Proto-West Germanicbermōyeast
4Proto-Germanicbermôyeast
5Proto-Indo-Europeanbʰér-mō ~ bʰr̥-mnés—
6Proto-Indo-Europeanbʰer-to bear, carry
Every word from Proto-Indo-European bʰer- →Every word from Proto-Indo-European bʰér-mō ~ bʰr̥-mnés →Every word from Proto-Germanic bermô →