The story
- Proto-Indo-European*sweh₂d-
- Proto-Indo-European*swéh₂dus
- Proto-Germanic*swōtuz
- Proto-West Germanic*swōtī
- Old Englishswēte
- Middle Englishswete
- Englishsweet
- Englishshrub
- English todaysweetshrub
From sweet + shrub, named for the pleasant aroma of the entire plant.
Etymology from Wiktionary, CC BY-SA 4.0.