刀 is one of the simplest Chinese characters and also a radical (刂) that appears in many knife-related characters: 切 (to cut), 刻 (to carve), 剪 (scissors), 割 (to slice).
culture
The Chinese kitchen traditionally uses one large cleaver (菜刀, càidāo) for nearly all cutting tasks — chopping vegetables, slicing meat, and even crushing garlic.