Where does “shoalweed” come from?

shoalweed (English) comes from English shoal, from Middle English schold, from Old English sċeald, from Proto-Germanic skalidaz, from Proto-Germanic skaljaną, from Proto-Germanic skalaz, from Proto-Indo-European (s)kelh₁- — to parch, wither.

Ancestry of “shoalweed”, step by step

shoalweed traces back through two separate lines of ancestry.

via English shoal

StepLanguageWordMeaning
1EnglishshoalShallow; A sandbank or sandbar creating a...
2Middle EnglishscholdAlternative form of scholde
3Old Englishsċealdshallow
4Proto-Germanicskalidaz
5Proto-Germanicskaljanąto peel, to shell
6Proto-Germanicskalazparched, shallow
7Proto-Indo-European(s)kelh₁-to parch, wither

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 (s)kelh₁-Every word from Proto-Germanic skalazEvery word from Proto-Germanic skaljaną