Where does “laerse” come from?

laerse (Middle Dutch) comes from Middle Dutch lederse, from Middle Dutch lederhose, from Middle Dutch leder, from Old Dutch lether, from Proto-Germanic leþrą, from Proto-Celtic ɸlitro-, from Proto-Indo-European pl̥tro-.

Ancestry of “laerse”, step by step

StepLanguageWordMeaning
1Middle Dutchlederse—
2Middle Dutchlederhose—
3Middle Dutchleder—
4Old Dutchlether—
5Proto-Germanicleþrąleather
6Proto-Celticɸlitro-—
7Proto-Indo-Europeanpl̥tro-—
Every word from Proto-Indo-European pl̥tro- →Every word from Proto-Celtic ɸlitro- →Every word from Proto-Germanic leþrą →