unassertive
adj. 不武断的; 谦逊的,谦虚的; 不过分自信的
1. inclined to timidity or lack of self-confidence;
2. not blatant or overly aggressive in manner or appearance;
Allen has a meek, timid, and unassertive nature.
艾伦是个温顺, 胆小, 拘谨的人.
Mr Lee is one of the very few modest, unassertive personalities in the company.
李先生是这个公司中极少数谦逊而不盛气凌人的人之一.