sapper
/ˈsæpə(r)/noun
1- a military engineer who lays or detects and disarms mines布雷工兵; 扫雷工兵。
1.1
- Brit. a member of the Corps of Royal Engineers (especially as the official term for a private)〈英〉皇家工兵（尤作二等兵的正式称呼）。
词源
early 17th cent.: from the verb SAP2 + -ER1.