Los voluntarios son infatigables al ayudar a los demás.
The volunteers are unflagging in helping others.
Context: society A pesar de los obstáculos, su actitud infatigable lo llevó al éxito.
Despite the obstacles, his unflagging attitude led him to success.
Context: personal development La infatigable búsqueda de conocimiento es admirable.
The unflagging pursuit of knowledge is admirable.
Context: education