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game played with stones on ice, 1610s, from present participle of curl (v.). "The name appears to describe the motion given to the stone" [OED]. A description of a similar game is attested from Flanders c.1600.
mid-15c., metathesis of crulle (c.1300), probably from an unrecorded Old English word or from Middle Dutch krul "curly," from Proto-Germanic *krusl- (cf. East Frisian krull "lock of hair," Middle High German krol, Norwegian krull, Danish krølle "curl"). The noun is recorded from c.1600.