The phrase "becomes lost in" signifies a state or condition wherein someone or something is completely absorbed or engrossed in a particular task, thought, or experience. Antonyms, or words that are the opposite of "becomes lost in," include "remains focused," "keeps on track," or "stays grounded." To remain focused means that someone is paying attention to the task at hand and is not easily distracted or sidetracked by other things. Keeping on track suggests that someone is working according to a plan or a set of objectives, and is not wandering aimlessly. Staying grounded means that someone is aware of their surroundings and is not in a state of confusion or disorientation.