Where does “ārsūra” come from?
ārsūra (Latin) comes from Latin ārsus, from Latin ārdeō, from Latin ardus, from Latin āridus, from Latin āreō, from Proto-Italic āzēō, from Proto-Indo-European h₂eHseh₁(ye)-, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.
Ancestry of “ārsūra”, step by step