This is the 5877th most frequent Chinese word.
垫
"垫" means "pad," "cushion," or "mat."
Here, '垫' is used as a verb, meaning 'to prop up or level by placing under'.
桌子腿下可以用一本书来垫着。
A book can be used to prop up under the table leg.
In this sentence, '垫' is used as a noun to mean 'cushion or mat', indicating an item used for comfort or support.
她买了一张新的坐垫。
She bought a new seat cushion.
'垫' is used as a verb here, meaning 'to place beneath or under something as a lining or support'.