Answer:
What word in the English language does the following: The first two letters signify a male the first three letters signify a female the first four letters signify a great while the entire world signifies a great woman?
I am shared by goats devils and unicorns.
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.