Improve

verb

1. To make (something) better; to increase the value or productivity (of something).

   "Buying more servers would improve performance."

2. To become better.

   "I have improved since taking the tablets."

3. To disprove or make void; to refute.
4. To disapprove of; to find fault with; to reprove; to censure.

   "to improve negligence"

5. To use or employ to good purpose; to turn to profitable account.

   "to improve one's time;  to improve his means"