undergrounder

noun
un·​der·​ground·​er | \ ˈən-dər-ˌgrau̇n-dər How to pronounce undergrounder (audio) \

Definition of undergrounder

: a member of the underground

First Known Use of undergrounder

1882, in the meaning defined above

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The first known use of undergrounder was in 1882

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to speak slightingly about or to degrade

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