roller skate
Word family adjectiverollablerolledroll-onnounrollerrollingrollawayrollbackrollbarroll-callrollcollarrollerballRollerbladerollerbladerrollerbladingrollerblindrollercoasterroller skaterolling pinrolling stockroll-on roll-offrolloutrolloverroll
Leisure
ˈroller skate noun [countableC] 
DLa special boot with four wheels fixed under it, used for skating on hard surfaces 四轮旱冰鞋；滚轴溜冰鞋 → Rollerblade, in-line skate →5 see picture at 见图 skate1 —roller-skate verb [intransitiveI]
—roller skating noun [uncountableU]
Examples from the Corpus
roller skate• All we do is dance and roller skate.