Answer:
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
I am enjoyed with a pot and some pointy sticks.
I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each.
My first 2 letters signify a male. My first 3 letters signify a female. My first 4 letters signify a great. I signify a great woman. What word am I?
Goes over all the hills and hollows, Bites hard, but never swallows.
Both old people and owls are said to be possessing this trait