transitive. To enlarge (the upper part of a cylindrical hole or cavity) to take the head of a screw. Also absol. Cf. countersink, v. 1.
| 单词 | θ102468 |
| 释义 | the world > space > relative position > condition of being open or not closed > making holes or becoming holed > make (an opening or hole) [verb (transitive)] > by boring, piercing, or perforating > enlarge borehole (1) counterbore1890 transitive. To enlarge (the upper part of a cylindrical hole or cavity) to take the head of a screw. Also absol. Cf. countersink, v. 1. |
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