This is the 540th most frequent Portuguese word.
efeito
"Effect" or "result."
Here, 'efeito' refers to the impact or change caused by an external factor, specifically light on the environment.
O efeito da luz no ambiente é notável.
The effect of light on the environment is noticeable.
In this context, 'efeitos' means visual or sound creations designed to enhance the experience of the scenes in the movie.
Ele assistiu a um filme cheio de efeitos especiais.
He watched a movie full of special effects.
Here, 'efeito' signifies the consequence or result produced by taking the medication, specifically the reduction of pain.