Words · Common
underground
/ˈʌndɚɡˌɹaʊnd/ · 11 letters · 7 distinct letters
- adjective
under the level of the ground
belowground storage areas
- adjective
conducted with or marked by hidden aims or methods
clandestine intelligence operations
- noun
a secret group organized to overthrow a government or occupation force
- noun
an electric railway operating below the surface of the ground (usually in a city)
in Paris the subway system is called the ‘metro’ and in London it is called the ‘tube’ or the ‘underground’
- adverb
in or into hiding or secret operation
the organization was driven underground