(每日一词）excavate

Excavate /ˈek.skə.veɪt/ v. 发掘；挖出

meaning 1: to dig in the ground to look for old buildings or objects that have been buried for a long time; to find sth by digging in this way 发掘，挖出（古建筑或古物）

Meaning 2: to make a hole, etc. in the ground by digging 挖掘，开凿，挖空（洞、隧道等）

1) 前缀：ex-向外

2) 词根：cav- 洞

3) 后缀：-ate 动词后缀

e.g. Ice age bones are being excavated in the caves. 冰河时期的遗骸正从岩洞中发掘出来。