The term BEAUTIFIES ONESELF can be summarized by the crossword solution PREENS, which is a 6 letter word. Preening is a behavior in which an animal or person cleans and arranges their feathers, fur, or hair. It is often done to make oneself look more attractive and is a form of self-grooming. In humans, preening can also refer to the act of dressing up and making oneself look more beautiful.