What are the opposite words for self-confident?

Antonyms for the word self-confident are words that indicate a lack of confidence, assurance, or credibility. These words include insecure, uncertain, doubtful, timid, shy, unassertive, unconfident, unsure, diffident, and self-doubting. These words represent people who are not sure of themselves or who feel inadequate in their abilities. They may lack courage or may be hesitant to assert themselves in social or professional situations. These individuals often lack self-esteem and may find it difficult to interact with others or make decisions in crucial moments. In contrast, a person who is self-confident is usually self-assured, confident, and has high self-esteem, which enhances their interactions with others, making them more successful in their personal and professional lives.