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