ELTBefore Father אב
'Father' 'ab' אב means 'after he spoke and created the heavens and earth א 'ah', he revealed himself to man ב 'b.
There are two other words which are also 'ab': green shoot, fruit on a tree. If I see footprints in the beach sand that I recognize, I might point and say 'father'. The footprints are not father, but evidence he passed that way.
The nature of a father is to give life. The word tells us that the Father gave us our first life; the green shoot, and our second life; fruit. Our birth is our first life, and our second birth is the fruit of teaching.
In word formations, if the letters are reversed, you get a reversal of meaning. The opposite of 'father' is not what you think. 'Bah' בא means 'come'. In 'אב', God took the initiative to reveal himself. The opposite is an invitation.
'Ab Bah' in Hebrew means 'Father come'.