verb (used with object), excavated, excavating.
to make hollow by removing the inner part; make a hole or cavity in; form into a hollow, as by digging: The ground was excavated for a foundation.
to make (a hole, tunnel, etc.) by removing material.
to dig or scoop out (earth, sand, etc.).
to expose or lay bare by or as if by digging; unearth: to excavate an ancient city.

1590–1600; < Latin excavātus (past participle of excavāre to hollow out), equivalent to ex- ex-1 + cav(um) hollow, cave + -ātus -ate1

reexcavate, verb (used with object), reexcavated, reexcavating.
unexcavated, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
excavate (ˈɛkskəˌveɪt)
1.  to remove (soil, earth, etc) by digging; dig out
2.  to make (a hole, cavity, or tunnel) in (solid matter) by hollowing or removing the centre or inner part: to excavate a tooth
3.  to unearth (buried objects) methodically in an attempt to discover information about the past
[C16: from Latin excavāre, from cavāre to make hollow, from cavus hollow]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1590s, from L. excavatus, pp. of excavare "to hollow out," from ex- "out" + cavare "to hollow," from cavus "cave." Related: Excavated; excavating.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Excavating there would require tunneling into cliffs-a dangerous proposition-with no guarantee of finding anything.
Linguists, he suspected, had been excavating too deeply for the innate component of language.
The hazard is the same when the superstructure of excavating equipment is rotated.
Excavating a deep pool at the south send of the lagoon.
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