roller/'rəʊlər $ 'roʊlər/

n. a tube-shaped piece of wood, metal, etc. that can be rolled over and over

n. [C] 滚筒；辊：a paint roller 涂料辊

◇The ancient Egyptians used long wooden rollers to move giant blocks of stone. 古埃及人用长滚木移动巨大的石块。

构词roll + -er