Where does “smartweed” come from?

smartweed (English) comes from English Smart, from English Ness, from Middle English nesse, from Old English næs, from Proto-Germanic nasją, from Proto-Indo-European néh₂s — nose.

smartweed (English): Any of a number of plants in the genus...

Definitions

  1. Any of a number of plants in the genus...

Ancestry of “smartweed”, step by step

smartweed traces back through two separate lines of ancestry.

via English Smart

StepLanguageWordMeaning
1EnglishSmart
2EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
3Middle Englishnesse
4Old Englishnæsnot, not at all; not; first/third-person singular...
5Proto-Germanicnasjąfoothill; headland; cape
6Proto-Indo-Europeannéh₂snose

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 néh₂s