Where does “fortschwemmen” come from?

fortschwemmen (German) comes from German Schwemmen, from Middle Dutch swemmen, from Old Dutch swimman, from Proto-Germanic swimmaną, from Proto-Indo-European swem(bʰ)- — to bend, turn, swing; to be unsteady, move, swim.

Ancestry of “fortschwemmen”, step by step

StepLanguageWordMeaning
1GermanSchwemmenplural of Schwemme
2Middle Dutchswemmento swim; to float; to overflow, to have in...
3Old Dutchswimmanto swim
4Proto-Germanicswimmanąto be unsteady; to swim; float
5Proto-Indo-Europeanswem(bʰ)-to bend, turn, swing; to be unsteady, move, swim
Every word from Proto-Indo-European swem(bʰ)- →Every word from Proto-Germanic swimmaną →Every word from Old Dutch swimman →