1. (noun)strain, straining an intense or violent exertion
2. (noun)distortion, overrefinement, straining, torture, twisting the act of distorting something so it seems to mean something it was not intended to mean
3. (adj)arduous, straining, strenuous taxing to the utmost; testing powers of endurance "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt