This was one of my favourite scriptures back in my JW days.
As a good little robot I would have said it means a "mighty god " ie in the role of and a "eternal father" figure ie in the role of - or some such thing. But, in my heart of hearts I would have thought naaah FT! Jesus is da man! I was a bit of a closet rebel like that. I had memorized official WT inerpretations but kept my private take on stuff, which probly explains why I ended up here.