Antonyms for the term "says yes to" could include "rejects," "denies," "declines," "refuses," "negates," "opposes," "disagrees," "vetoes," and "contradicts." When someone rejects an offer or a request, they are essentially doing the opposite of saying "yes." Similarly, when someone denies something, they are negating the possibility of agreement. When someone declines, refuses, or disagrees, they are also choosing not to say "yes." When someone opposes or vets something, they actively work against agreement. Therefore, knowing these antonyms can be useful when looking for alternative ways to express oneself or when understanding someone's response.