The phrase "under one's wing" is a metaphorical expression that means to be protected, guided, and supported by someone. Antonyms of this phrase could include "abandoned," "neglected," "ignorance," "self-reliant," and "independent." To be under someone's wing suggests a level of dependence and vulnerability, whereas antonyms suggest individualism and self-reliance. Being abandoned or neglected would mean having no support system or guidance, while self-reliance and independence would suggest not needing or wanting anyone's help. Ignorance would suggest a lack of knowledge or guidance, whereas being under someone's wing would suggest the opposite. Ultimately, antonyms would suggest the absence of the support, guidance, and protection that comes with being under someone's wing.