This is the 10447th most frequent Portuguese word.
fadiga
Fatigue or extreme tiredness.
Here, 'fadiga' is used to describe physical tiredness resulting from intense physical activity.
Eu estou sentindo fadiga após o treino intenso.
I am feeling fatigue after the intense workout.
In this sentence, 'fadiga' refers to mental exhaustion due to intellectual effort.
A fadiga mental pode ser causada por excesso de trabalho intelectual.
Mental fatigue can be caused by excessive intellectual work.
Here, 'fadiga' is employed in a technical sense, referring to the weakening of materials over time due to stress and usage.