To Improve

1. (transitive) To make (something) better; to increase the value or productivity (of something).
2. (intransitive) To become better.
3. (obsolete) To disprove or make void; to refute.
4. (obsolete) To disapprove of; to find fault with; to reprove; to censure.
5. (dated) To use or employ to good purpose; to turn to profitable account.

:{Synonyms

• (to make something better): ameliorate, better, batten, enhance

Antonyms

• (to make something worse): deteriorate, worsen; aggravate
• (to become worse): deteriorate, worsen