In Latin, you have pater. And by way of Latin, in modern English, we have words like paternity and paternal. But going through the Germanic languages, you have, once again, that the sound becoming more of a the sound, and you also see this pattern as you go from this Proto-Indo-European, this theoretical language, and especially if you think about relative to Sanskrit, that you have this sound going from a pa to a fa as you go to the Germanic languages. So piter becomes, you could say father. In other words, na in Sanskrit, and those of you who speak Hindi or Bengali would recognize that, of course, and in English, it is no. Gau, which is still, it's the Hindi word for cow. In English, it's cow, gau, cow.