Spent is the most negative connotation.
Explanation:
Fatigued is to feel exauhsted.
Weary is lack of sleep, tiredness.
Tired is just a minimal drousy feeling.
And spent is as if your energy was all used up, consumed.
I would enjoy being a cat because they have a perfect life if they are fortunate enough not to be dumped and have to sleep and eat out in the cold. I would like to see the world through a cats eyes and receive all the love that my cat's receive. I am an animal advocate and it breaks my heart to see any animal in duress.
Where's the passage? I don't see it.
Well what are the choices
I'm guessing a metaphor because it's comparing the sea mist to a curtain