Prevention; actions or measures taken to stop something undesirable from occurring, such as accidents or problems (noun/suru).
事故防止のために速度制限が設けられている。
Speed limits are set to prevent accidents.
病気の進行を防止するには早期発見が重要だ。
Early detection is important to prevent the progression of disease.
不正行為の防止策を講じる必要がある。
It is necessary to implement measures to prevent misconduct.