improve

Synonyms: advance ameliorate amend augment better boost civilize come around convalesce correct cultivate develop doctor up edit elevate emend enhance gain ground help increase lift look up make strides meliorate mend perk up pick up polish progress promote purify raise rally recover rectify recuperate refine reform revamp revise rise set right shape up sharpen skyrocket straighten out take off touch up turn the corner update upgrade

Antonyms: damage decline decrease diminish harm hurt injure weaken worsen