The term "over confident" refers to a person who is excessively self-assured and feels invincible in most situations. Antonyms for this word would be "insecure," "doubtful," "uncertain," "nervous," or "apprehensive." Instead of feeling too sure of themselves, people who display these traits tend to be hesitant and lack self-confidence. Furthermore, individuals who are "modest," "humble," "timid," "cautious," or "thoughtful" can also be considered antonyms of "over confident." These characteristics demonstrate a level-headed approach to life that strives towards finding balance and avoids jumping to conclusions without careful consideration. In essence, anyone who is not overconfident can be considered an antonym of the term.