‘垫子’ (diàn zi) is a common noun meaning ‘mat’ or ‘cushion’—a flat, soft object placed on a surface to provide comfort, protection, or insulation. The first character 垫 (diàn) means ‘to pad’, ‘to cushion’, or ‘to support from below’, conveying the functional purpose; the second character 子 (zi) is a diminutive noun suffix that turns the verb into a concrete object, much like ‘-er’ or ‘-ing’ in English (e.g., ‘cushioning’ → ‘cushion’). Together, they refer specifically to a portable, often foldable or rollable item used under feet, knees, pets, furniture legs, or yoga practitioners.

This word appears frequently in daily life: yoga mats (瑜伽垫), mouse pads (鼠标垫), doorstop mats, and pet beds are all types of 垫子. It emphasizes function over form—material (rubber, foam, cloth) and thickness matter more than decoration. Unlike ‘地毯’ (carpet), which is typically wall-to-wall or large-area floor covering, 垫子 is smaller, movable, and task-oriented.