Question 155: What significance has the word "Abba," as when it precedes the word "Father”?

Answer:

"Abba" is the Hebrew word for "father," in the emphatic or definite state, as "thy father." Its use in referring to YHVH was common among the Jews; but in order that it might not seem too familiar or irreverent, the New Testament writers gave it the twofold form, which has become a recognized phrase in worship. It is as though they said: "Father, our Father." There is a difference however – When you say the Hebrew word “Avi” it means “my Father” as if and when you are in conversation with your Father. It is more personal. Avi is more personal in prayer when communicating with Elohiym.