1. third person singular present indicative of enfraquecer; to make weak or weaker; to reduce strength or vigor
The illness weakens his body.
A doença enfraquece seu corpo.
2. to diminish in intensity, effect, or influence
This argument weakens their position.
Este argumento enfraquece a posição deles.
3. to lose strength or become weak (reflexive form: enfraquece-se)
His resolve weakens with time.
Sua determinação se enfraquece com o tempo.