Where does “oesterzwam” come from?

oesterzwam (Dutch) comes from Dutch zwam, from Middle Dutch swam, from Old Dutch swam, from Proto-Germanic *swammaz, from Proto-Indo-European swombh- — sponge, tree-fungus, swamp.

oesterzwam (Dutch): oyster mushroom any mushroom of the genus

Definitions

  1. oyster mushroom any mushroom of the genus

Ancestry of “oesterzwam”, step by step

oesterzwam traces back through two separate lines of ancestry.

via Dutch zwam

StepLanguageWordMeaning
1DutchzwamA fungus, mushroom; A sponge
2Middle Dutchswam—
3Old Dutchswam—
4Proto-Germanic*swammaz—
5Proto-Indo-Europeanswombh-sponge, tree-fungus, swamp

via Dutch oester

StepLanguageWordMeaning
1Dutchoesteroyster, mollusc of the family Ostreidae
2Middle Dutchoester—
3Latinostreaoyster, mussel
4Ancient Greekὄστρεονbivalve; oyster; purple pigment, probably that...
Every word from Proto-Indo-European swombh- →Every word from Proto-Germanic *swammaz →Every word from Old Dutch swam →