Kinesics is the study of body movement, facial expressions, gestures, and postures. The opposite of kinesics is stillness or immobility, which refers to the state of being still or motionless. Other antonyms for kinesics include rigidity, inactivity, and paralysis, which refer to a lack of movement or flexibility. Another antonym could be verbal communication, as this refers to the use of language as opposed to nonverbal communication. Antonyms provide a helpful contrast to a word's meaning, allowing for a more complete understanding of its nuances and implications.