Where does “vapour” come from?

vapour (Anglo-Norman) comes from Old French vapor, from Latin vapōr — steam, exhalation, vapour; smoke.

Ancestry of “vapour”, step by step

StepLanguageWordMeaning
1Old FrenchvaporAlternative form of vapeur
2Latinvapōrsteam, exhalation, vapour; smoke

Words derived from “vapour”

Every word from Latin vapōr →Every word from Old French vapor →
vapour — Etymology, Origin & Word History | Etymology Explorer