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| sap [ sap ] |
noun (plural saps) |
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| Definition: |
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tunnel leading to enemy: a covered trench, dug to approach or get inside enemy territory
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verb (past and past participle sapped, present participle sap·ping, 3rd person present singular saps) |
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| Definition: |
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1. intransitive verb dig sap: to dig a covered trench to approach or get inside enemy territory
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2. transitive verb tunnel under fortifications: to weaken the foundations of an enemy fortification with a tunnel
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3. transitive verb take away somebody's energy: to gradually weaken or reduce something, especially somebody's strength or energy
 The long hours were sapping his strength.
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| [Late 16th century. Via French and Italian< late Latin sappa] |