Sunblock, also known as sunscreen, is a product used to protect the skin from the sun's ultraviolet (UV) radiation. It is typically applied to the skin before going outdoors and is available in many forms, including lotions, creams, sprays, and gels. The crossword solution for sunblock is 'PARASOL, ' which is a type of umbrella that provides shade from the sun. Parasols are often used to protect people from the sun's UV rays, making them an ideal solution for sunblock.