The term 'brightens' can be defined as making something look or feel more cheerful, lively, or attractive. The crossword solutions for this term are 'gilds' (5 letters), 'ELATES' (6 letters), 'perksup' (7 letters), and 'illumines' (9 letters). Gilding is the process of covering an object with a thin layer of gold or other precious metal, which can make it appear brighter and more attractive. Elation is a feeling of great joy or pride, which can also brighten someone's mood. Perking up is a phrase used to describe a sudden increase in energy or enthusiasm, which can also brighten a person's outlook. Illumination is the process of providing light, which can also make a space appear brighter.