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excavate (v.)

"to hollow out, make hollow by digging or scooping, or by removing extraneous matter," 1590s, from Latin excavatus, past participle of excavare "to hollow out," from ex "out" (see ex-) + cavare "to hollow, hollow out," from cavus "cave" (from PIE root *keue- "to swell," also "vault, hole"). Related: Excavated; excavating.

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Definitions of excavate from WordNet

excavate (v.)
recover through digging;
excavate gold
Schliemann excavated Troy
Synonyms: unearth
excavate (v.)
find by digging in the ground;
Synonyms: dig up / turn up
excavate (v.)
form by hollowing;
Carnegie had a lake excavated for Princeton University's rowing team
excavate a cavity
excavate (v.)
remove the inner part or the core of;
the mining company wants to excavate the hillside
Synonyms: dig / hollow
From wordnet.princeton.edu