BUT! Renege doesn't, to me, sound like a word that would be used in the context of the song.
It sounds unnatural and forced.

And, Snuffy, I can't get my head around your post.

And, again, I would say that "unfraid" isn't a good choice of word, anyway.

I know we often talk about facing the future unafraid, but not in the "lovey dovey" warm context of "Winter Wonderland".