The word that best describes people who try to make themselves look good by putting others down is "narcissistic" or "egotistical." Such individuals often engage in behavior known as "narcissistic or egotistical self-enhancement," where they attempt to boost their self-esteem and self-worth by devaluing or criticizing others. This behavior is rooted in a need for validation and superiority over others, which can be indicative of underlying insecurity or a fragile self-concept. It is essential to recognize and address such behavior, as it can have negative effects on interpersonal relationships and the well-being of those involved.