4.Strength,power,force,might suggest capacity to do something. Strength is inherent capacity to manifest energy, to endure, and to resist. Power is capacity to do work and to act. Force is the exercise of power: One has the power to do something. He exerts force when he does it. He has sufficient strength to complete it.Might is power or strength in a great or overwhelming degree: the might of an army.
Old English strengþu "power, force, vigor, moral resistance," from Proto-Germanic *strangitho (cf. Old High German strengida "strength"), in gradational relationship to the root of strong, with Proto-Germanic abstract noun suffix *-itho (see -th (2)).