Becoming immobilized means to become stuck or unable to move. The antonym for becoming immobilized is being mobile or able to move freely. When one is mobile, they are able to move around and carry out activities without any hindrance or difficulty. Other antonyms for becoming immobilized include energetic, active, lively, and agile. These words portray a sense of movement and agility, indicating that the person is not hindered by any form of immobility or lethargy. It is essential to strive towards being mobile and active to maintain a healthy lifestyle and avoid becoming immobilized.