English
horsebane
horse + bane
Proto-Germanic *hrussą ‘horse’
Proto-West Germanic *hross ‘horse’
Old English hors ‘horse’
Middle English hors ‘a horse’
English horse
Proto-Germanic *banô ‘killer, murderer, slayer’
Proto-West Germanic *banō
Old English bana ‘person or thing that causes death, murderer’
Middle English bane ‘person or thing that destroys life, murderer,…’
English bane
Today it means
noun Synonym of fine-leaved water-dropwort (Oenanthe aquatica).
Language periods are conventional ranges, not dates for this word.
Etymograph / horsebane