Where does “swampweed” come from?

swampweed (English) comes from English swamp, from Middle English swam, from Old English swamm, from Proto-Germanic *swammaz, from Proto-Indo-European swombh- — sponge, tree-fungus, swamp.

swampweed (English): Any weed that is found in, or commonly grows in, a swamp

Definitions

  1. Any weed that is found in, or commonly grows in, a swamp

Ancestry of “swampweed”, step by step

swampweed traces back through two separate lines of ancestry.

via English swamp

StepLanguageWordMeaning
1EnglishswampA piece of wet, spongy land; low ground saturated...
2Middle Englishswamswamp, muddy pool, bog, marsh", also "fungus,...
3Old Englishswammmushroom, fungus; sponge; first/third-person...
4Proto-Germanic*swammaz
5Proto-Indo-Europeanswombh-sponge, tree-fungus, swamp

via English weed

StepLanguageWordMeaning
1EnglishweedAny plant regarded as unwanted at the place...
2Middle Englishweed
3Old Englishwēodweed
4Proto-West Germanic*weudweed (unwanted plant)
Every word from Proto-Indo-European swombh-