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Word by Word Definitions
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: beneath the surface of the earth
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: in or into hiding or secret operation
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: a subterranean space or channel
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: an underground city railway system
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: a movement or group organized in strict secrecy among citizens especially in an occupied country for maintaining communications, popular solidarity, and concerted resistive action pending liberation
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: being, growing, operating, or situated below the surface of the ground
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: conducted by secret means
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: existing outside the establishment
Seen and Heard
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