As words build up from letters, they retain the meaning of the smaller combinations of letters within. There are several ways this takes place:
Compounding includes conjugation, prefixing, suffixing and attaching other gates or roots.* In compounding, the original meaning carries forward to the new meaning.
To form abiy from ab a yod is added as a suffix. It becomes ‘my father’.
The challenge is to see how a word containing ab אב relates to the father when it is not obvious. This form is by attribution. The combination refers to an attribute of the original.
The bet ב represents the revelation coming to man.
The Father is the one who, after the creation, made himself known to man. He is the father ab אב. The word ab אב also means greenness, freshness, and fruit.
Here is a different expression of the metaphor speaking of the result of the creation, and what man could see of the creation when God revealed himself. It was a fresh, green world bearing fruit. The greenness and fruitfulness ab אב is the testimony of the Father.
How do we know the Father exists? By the testimony of his creation. It is fruitful. Like begets like. Life continues.
Ro 1:19 ¶ Because that which may be known of God is manifest in them; for God hath shewed [it] unto them.
Ro 1:20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, [even] his eternal power and Godhead; so that they are without excuse:
Another example of formation by attribution is the word perish. The word for perish is abad אבד; the Father’s אב command or spoken word ד.
2Co 3:6 ¶ Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
The word without the life, kills. You perish. Perish is also the mist ayd אד with a revelation to man bet ב inside. The testimony of creation also kills.
Ge 2:6 But there went up a mist from the earth, and watered the whole face of the ground.
*Gates are two-letter combinations. Roots are three-letter combinations