make sharp or sharper; sharpen the knives'
make crisp or more crisp and precise; We had to sharpen our arguments'
become sharp or sharper; The debate sharpened'
put (an image) into focus; Please focus the image; we cannot enjoy the movie
make (images or sounds) sharp or sharper
raise the pitch of (musical notes)
give a point to; The candles are tapered
make (ones senses) more acute; This drug will sharpen your vision
[ Syn: heighten ]