Sharpen 
To dream of sharpening an object indicates that you are too rigid with your opinions and ideas. You need to be receptive to other suggestions and remember that there are others involved in making decisions as well.
Impale
To dream that you are being impaled symbolizes a powerful, violent, or ardent release of your repressed feelings. You have been symbolically liberated from the physical boundaries of your own psyche. You are no longer holding back in expressing your aggressive emotions. Try to recall which body part is being impaled for added clues on the significance of your dream.
Grindstone
To dream that you are turning a grindstone indicates success through strength and focused energy.
To dream that you are sharpening tools on a grindstone represents that your companions will always be available to help you when necessary.
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