to make something right when it was previously incorrect, improper, or defective
修正する, 直す
to examine, repair, and make significant improvements or changes to something
見直す, 改善する
to fix something that is damaged or broken so it can work or be used again
修理する, 直す
to make changes or additions to a document, law, contract, or similar text in order to improve, correct, or update it
修正する, 変更する
to prepare something for use, often by improving its condition or appearance
修理する, 整える
to better or increase someone or something's quality, strength, value, etc.
向上させる, 強化する
to improve a machine, computer system, etc. in terms of efficiency, standards, etc.
アップグレードする, 改善する
to develop from a simple form to a more complex or sophisticated one over an extended period
進化する, 発展する
to enhance the quality of something, particularly by adding something to it
豊かにする, 改善する
to make something work at its best by improving how it functions or performs
最適化する, 改善する
to make very precise adjustments, usually small ones, to improve or perfect something
微調整する, 調整する
to make something, particularly something unpleasant or unsatisfactory, better or more bearable
改善する, 和らげる