Where does “myśe” come from?

myśe (Lower Sorbian) comes from Lower Sorbian myś, from Proto-Slavic myti, from Proto-Indo-European muH-.

Ancestry of “myśe”, step by step

StepLanguageWordMeaning
1Lower Sorbianmyśto wash
2Proto-Slavicmytito wash
3Proto-Indo-EuropeanmuH-—
Every word from Proto-Indo-European muH- →Every word from Proto-Slavic myti →Every word from Lower Sorbian myś →