Humble : having or showing a modest or low estimate of one's importance.Whimsical : playfully quaint or fanciful, especially in an appealing and amusing way.Youthful : young or seeming young.Vain : having or showing an excessively high opinion of one's appearance, abilities, or worth.Unassuming : not pretentious or arrogant; modest.Antonym of Humble is Vain