Answer:
A word I know, six letters it contains. Subtract just one and twelve remains.
It cannot be seen, cannot be felt, Cannot be heard, cannot be smelt. It lies behind stars and under hills And empty holes it fills. It comes first and follows after, Ends life, kills laughter.
High born, my touch is gentle. Purest white is my lace. Silence is my kingdom. Green is the color of my death.
White bird, featherless, flying out of paradise. Flying over sea and land. Dying in my hand.
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
You use it between your head and your toes, the more it works the thinner it grows.