Where does “Smart” come from?

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

Ancestry of “Smart”, step by step

Smart traces back through two separate lines of ancestry.

via English Ness

StepLanguageWordMeaning
1EnglishNessAn 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
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose

via Middle English smerte

StepLanguageWordMeaning
1Middle Englishsmertepainful, hurtful, punishing, injurious;...
2Middle EnglishsmertenTo smart, injure, cause pain; To smart, hurt, be...
3Old Englishsmeortanto smart; hurt
4Proto-Germanicsmertanąto hurt
5Proto-Indo-European(s)merd-to bite, to sting

Words derived from “Smart

Every word from Proto-Indo-European néh₂s