suru verb (irregular), transitive verb
improve; make better
General transitive use: actively make something better in quality, condition, or state.
生活環境をよくするために引っ越した。
I moved to improve my living environment.
This medicine improves the condition of your skin.
suru verb (irregular), transitive verb
do often; frequently do
Used with nouns or nominalized verbs to express habitual or frequent action. Often seen in patterns like ～をよくする or ～することがよくする.
彼は遅刻をよくする。
He is often late.
この辺りは地震をよくする。
Earthquakes occur frequently in this area.
suru verb (irregular), transitive verb
treat well; be kind to
Used when someone treats another person or animal kindly or favorably. Often implies considerate behavior.
彼はいつも部下をよくする。
He always treats his subordinates well.
動物をよくするのは大切なことだ。
It is important to treat animals kindly.