Which of the following represents motion as a noun root form and is not an adjective?

• A. Kineto
• B. Kinematics
• C. Motion
• D. Kinesis

Answer: (D)

Motion as a noun is captured by the noun form kinesis. This Greek-root word denotes the act or process of moving and appears in terms like kinesiology, where the focus is on motion itself. Kineto- is a combining form used to build words and isn’t a standalone noun. Kinematic is an adjective describing something related to motion. Kinematics refers to the study of motion, a noun, but it isn’t the direct noun form of motion itself. So the noun root form representing motion is kinesis.