The phrase "leaves alone" refers to the act of abandoning or forsaking someone, something or a particular situation. The antonym for "leaves alone" is "stays with" or "remains with". These words denote the act of standing by someone, providing support or staying committed to a situation. Other antonyms for "leaves alone" include "stays by", "keeps company with", "supports", "looks after", "attends to", and "cares for". It is important to understand these antonyms in order to use them appropriately in written and spoken communication, as they help clarify the intended meaning of a phrase and avoid confusion or misunderstanding.