verb/reaɡθjoˈnaɾ/
to react
Etymology tree Proto-Italic *wre- Latin re- Proto-Indo-European *h₂eǵ- Proto-Indo-European *-eti Proto-Indo-European *h₂éǵeti Proto-Italic *agō Latin agō Latin reagō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Medieval Latin reāctiōnembor. Spanish reacción Spanish -ar Spanish reaccionar From reacción + -ar.