strenuous

This term describes an intensity of effort that pushes a person toward their physical or mental limit. It carries a connotation of taxing labor or grueling activity, often implying that the task is exhausting or requires a high degree of endurance. While it can describe a physical workout, it is equally applicable to intellectual or emotional struggles that demand total commitment. When used in a social or political context, such as strenuous objections or denials, the word shifts from physical exertion to an expression of vigor and intensity. In these cases, it signals a forceful, determined opposition rather than a literal physical struggle, emphasizing the strength of the conviction behind the action.