The term WASH HARD can be summarized by the crossword solution SCRUB, which is a five-letter word. Scrubbing is a cleaning technique that involves using a brush or other abrasive material to remove dirt and grime from surfaces. It is often used in bathrooms and kitchens to remove soap scum, grease, and other stubborn stains. Scrubbing is also used to clean hard-to-reach areas such as corners and crevices.