a loose aggregation of small water-worn or pounded stones 砾石 ■a mixture of such stones with coarse sand, used for paths and roads and as an aggregate (用于铺路及用作三合土的)砂砾 ■a stratum or deposit of such stones 砂砾层 ■(Medicine)aggregations of crystals formed in the urinary tract (医)尿砂
(US informal)make (someone) angry or annoyed (美,非正式)使气恼,搅扰 the strike was badly organized and it gravelled him to involve himself in it. 这次罢工组织不力,他为自己参与其中而感到懊恼。 ■(archaic)make (someone) feel confused or puzzled (古)使困惑
语源
Middle English: from Old French, diminutive of grave (see grave)