Complex sentence: It was inherited by the Romance languages in French "Dieu", Spanish "Dios", Portuguese "Deus", Italian "Dio" and as such is the common root for the word day in each.
Split into simpler sentences: It was inherited by the Romance languages in French "Dieu", Spanish "Dios", Portuguese "Deus", Italian "Dio". As such it is the common root for the word day in each.