Leant on is a phrasal verb that means to rely on or to depend on someone or something. Its antonyms are words that express the opposite meaning. The first antonym is to stand alone or independently, meaning not to require any support or assistance. The second antonym is to be self-sufficient, meaning to be able to take care of oneself without relying on others. The third antonym is to be self-reliant, which means to be able to rely on oneself and take responsibility for one's own actions. The fourth antonym is to be self-supporting, which means to be able to provide for oneself without assistance from others. Lastly, the fifth antonym is to be self-standing, which means to be able to stand upright without any support.