“Tabaarak Allaah”: means: tremendously great is the One whose actions are these, He the Perfect and Most High. And whose Ability is such and these are the things which He has created, He the Exalted and Most High.
And, “Tabaarak”: is a verb which is used specifically for Him, He the Perfect, so it cannot be applied to anyone besides Him. And al-Barakah (blessing) it means abundance of good and its increase, and the blessings which come from Allaah the Majestic and Most High do not end. As for a created being, it cannot be said about him, “tabaarak”. Rather it can be said to him, “mubaarak” meaning, “May you receive blessing”, meaning may Allaah put blessing into him and make him blessed. And all blessing is from Allaah the Perfect and Most High.
Sharh-ul-Usool-ith-Thalaathah by Shaikh Saalih al-Fawzaan
Explained by Dawud Burbank rahimahullaah
Above are the Excerpts from Transcribed Audio