Antonyms for the phrase "make a pass at" would include words such as "ignore," "neglect," "disregard," "reject," and "disinterest." These words suggest a lack of interest or attraction, and a refusal to engage in flirtatious behavior. Other antonyms might include "respect," "value," "abstain," or "avoid," which convey a sense of respect for boundaries and personal autonomy. Ultimately, the antonyms for "make a pass at" differ greatly depending on the context and intentions of the person making the pass. It is important to understand and respect the feelings and boundaries of others in any social interaction.