Affixes

The spelling of English words derived from the Greek roots has been very variable. Kinesiology is the study of the mechanics of body movements; kinaesthesia (Greek aisthēsis, sensation) (US kinesthesia) is awareness of the position and movement of the parts of the body by means of sensory organs in the muscles and joints; kinematics is the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion; the adjective kinetic concerns motion; a kinetoscope is an early motion-picture device in which the images were viewed through a peephole. See also cine‑.