underground
definition: beneath the surface of the earth
example: water flowing underground
speech part: adverb
synonyms:
definition: in or into hiding or secret operation
example: the organization was driven underground
speech part: adverb
synonyms:
definition: conducted with or marked by hidden aims or methods
example:
speech part: adjective
synonyms:
hugger-mugger
definition: under the level of the ground
example:
speech part: adjective
synonyms:
belowground
definition: an electric railway operating below the surface of the ground (usually in a city)
example: in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'
speech part: noun
definition: a secret group organized to overthrow a government or occupation force
example:
speech part: noun
synonyms:
resistance