Antonyms for the phrase "becomes immobilized" can include words such as "mobilizes," "activates," "energizes," "initiates," and "starts." These antonyms give off a different meaning which would imply that an individual or object is no longer inactive and is able to move freely. They describe a situation where someone or something is full of energy and ready to start a new journey. The opposite of being immobilized involves breaking free from any restrictions that may have held someone back, and instead harnessing the power to move forward towards new goals with confidence and strength.