Spasms and cramps can be mild or extremely painful. 1  While they can happen to any skeletal muscle, they are most common in the legs and feet and muscles that cross two joints (the calf muscle, for example). Cramps can involve part of a muscle or all the muscles in a group.
Weak is the opposite of strong. Muscles, arguments, defenses, and coffee can all be weak â and when they are, it's not good. Anything weak is lacking in strength or power. If your muscles are weak, you can't lift much. If your will power is weak, you give up easily. Food and drinks with little flavor are weak, and an argument that is flimsy is weak.
gravÂ·iÂ·ty. 1. The attraction that objects have for each other merely because they have mass and occupy space. Gravity is the weakest of the four basic forces in nature, being weaker than the strong nuclear force, the electromagnetic force, and the weak nuclear force.