挖掘, 開鑿, 挖出, 挖空
英英解釋: 動詞excavate:1. lay bare through digging
同義詞: unearth
2. find by digging in the ground
同義詞: dig up, turn up
3. form by hollowing
4. remove the inner part or the core of
同義詞: dig, hollow
字根詞源
cav=hollow中空的來源於 拉丁文 cavus,“hollow”。如:cave洞穴;excavate向外挖空,挖掘;excavator挖土機;
concave凹的。 反義詞:convex凸的