Instead of taking someone under your wing, one may choose to alienate them. Antonyms for taking under one's wing could include "ignoring," "neglecting," or "shunning." If someone is not taking another under their wing, then they are leaving them to fend for themselves. Other antonyms include "excluding," "avoiding," and "rejecting." It is important to note that taking someone under your wing requires patience and empathy. Therefore, antonyms for taking under one's wing suggest a lack of understanding, concern, or willingness to help others.