The antonyms that can be used for the word "more self-asserting" are timid, meek, submissive, shy, deferential, retiring, bashful, introverted, and unassertive. These words indicate a personality that is hesitant, lacks confidence, and avoids confrontation. A timid individual may be too afraid to speak up for themselves, while someone who is shy may feel anxious in social situations. Similarly, a meek and unassertive person may not want to challenge authority, preferring instead to remain passive. However, it should be noted that being assertive can be a positive trait when used appropriately, as it can help individuals communicate their needs and stand up for themselves.