"Une main lave l'autre" is a French proverb that translates to "One hand washes the other." It emphasizes the idea of mutual assistance and cooperation. The saying suggests that people can benefit from helping each other, creating a sense of reciprocity in relationships. This proverb is often used in various contexts, including business, friendship, and community. It highlights the importance of collaboration, where individuals or groups support one another to achieve common goals. By working together, they can enhance their effectiveness and foster a sense of solidarity.