1An effect or effectiveness — the desirable result or influence produced by an action, treatment, or measure.
ダイエットの効果はなかなか目に見えて現れなかった。
The effects of the diet were slow to become visible.
広告の効果を調べるためにアンケートを実施した。
We conducted a survey to check how effective the advertisement was.
このストレッチには肩こりを和らげる効果がある。
This stretch has the effect of easing shoulder stiffness.
早めに謝ったことが効果を発揮し、相手も落ち着いた。
Apologizing early had the desired effect, and the other person calmed down.
2Effects such as sound, visual, or special effects used to enhance a film, play, or other production.
雷の効果は舞台袖で太鼓を叩いて表現していた。
The thunder effect was produced by beating a drum in the wings.
低予算の映画だったが、効果の使い方が巧みで迫力があった。
It was a low-budget film, but the effects were used cleverly and packed a punch.