Someone who extremely lacks self confidence. An insecure person, would be introverted. He/She won't know their worth. They would dislike their physical appearance & constantly compare themselves to their peers. Never feeling good enough, feeling sorry for themselves, feeling sorry for people who look at them. Insecure people are really kind at heart, they just don't love themselves. Due to the influence of other, be kind. Words do hurt, what you say matters.