sharpen

Definition (verb): make sharp or sharper

Example: sharpen the knives

Definition (verb): make crisp or more crisp and precise

Example: We had to sharpen our arguments

Definition (verb): become sharp or sharper

Example: The debate sharpened

Definition (verb): put (an image) into focus

Example: Please focus the image; we cannot enjoy the movie

Definition (verb): make (images or sounds) sharp or sharper

Definition (verb): raise the pitch of (musical notes)

Definition (verb): give a point to

Example: The candles are tapered

Definition (verb): make (one’s senses) more acute

Example: This drug will sharpen your vision