The word immotile refers to something that is incapable of movement. In contrast, its antonyms describe a range of qualities related to movement. For example, mobile, nimble, agile, and sprightly are all antonyms of immotile. Each of these words denotes a degree of physical ability or alacrity, suggesting a readiness for action or an ability to move quickly and fluidly. Other antonyms, such as dynamic, kinetic, flexible or energetic, describe a state of constant movement or motion, whether in the physical or mental sense. In all, the antonyms for immotile signify a range of qualities related to movement or activeness, lending a positive, vibrant quality to language.