late 14c., knobe, probably from a Scandinavian or German source (compare Middle Low German knobbe "knob," Middle Dutch cnoppe, Dutch knop, Old Frisian knopp, knapp, Old High German knopf, German Knopf "button," Old Norse knyfill "short horn"). Meaning "knoll, isolated round hill" is first recorded 1640s, especially in U.S.
实用例句
1. Top the steaming hot potatoes with a knob of butter.
在冒热气的马铃薯上放一小块黄油。
来自柯林斯例句
2. The cutters are opened by turning the knob anticlockwise.