Where does “hardloopster” come from?

hardloopster (Dutch) comes from Dutch hardlopen, from Dutch hard, from Middle Dutch hart, from Old Dutch hart, from Proto-West Germanic hard(ī), from Proto-Germanic harduz, from Proto-Indo-European kert-, from Proto-Turkic *keŕ- — to travel, tour.

Ancestry of “hardloopster”, step by step

StepLanguageWordMeaning
1Dutchhardlopento run
2Dutchhardhard, strong; strong, not easily devalued;...
3Middle Dutchharthard; solid, sturdy; hard, harsh, cruel
4Old Dutchharthard
5Proto-West Germanichard(ī)hard
6Proto-Germanicharduzhard; brave
7Proto-Indo-Europeankert-times; to weave, twist together; time
8Proto-Turkic*keŕ-to travel, tour
Every word from Proto-Turkic *keŕ-