mass noun
1- a loose aggregation of small water-worn or pounded stones砾石。
1.1
- 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。
1.2
- a stratum or deposit of such stones砂砾层。
1.3
- Medicine aggregations of crystals formed in the urinary tract【医】尿砂。
(gravelled, gravelling; <美> graveled, graveling) with obj.
1
- cover (an area of ground) with gravel用砂砾铺（地）。
2
- 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。
2.1
- archaic make (someone) feel confused or puzzled〈古〉使困惑。
词源
Middle English: from Old French， diminutive of grave （see GRAVE4）.