[{"Bold_text": "noun", "List Items": ["(used with a singular verb)Physics.the branch of mechanics that deals with the motion and equilibrium of systems under the action of forces, usually from outside the system.", "(used with a plural verb)the motivating or driving forces, physical or moral, in any field.", "(used with a plural verb)the pattern or history of growth, change, and development in any field.", "(used with a plural verb)variation and gradation in the volume of musical sound.", "(used with a singular verb) psychodynamics ."]}]