<unk>  describes a darkening of the skin (especially of fair-skinned individuals) in a natural physiological response stimulated by exposure to ultraviolet radiation from<unk> shine (or a<unk> bed).  With excess exposure to the<unk> , a<unk> tanned area can also develop<unk> burn.
Sun tanning
Web colors
Wrinkle
Gaslighting
Carcinogen
Seafood
Mourning
Dental restorative materials