The antonyms for the phrase "on one's own" include "in a group," "with company," "collaborative," "shared," and "assisted." These antonyms evoke a sense of togetherness and support rather than individualism and independence. Being in a group or collaborating with others can bring new ideas and perspectives to a task or project, making it easier to accomplish. Sharing responsibilities can also alleviate the burden of carrying out a task alone. Being assisted can provide the necessary guidance and motivation to achieve success. Therefore, it is essential to recognize and appreciate the value of working with others to achieve common goals in various aspects of life.