Related / Similar Words:
metro, subway, tube, resistance, guerrilla(a), guerilla(a), irregular, clandestine, cloak-and-dagger, hole-and-corner(a), hugger-mugger, hush-hush, on the quiet(p), secret, surreptitious, undercover, belowground Definition: electric underground railway;a secret group organized to overthrow a government or occupation force;used of independent armed resistance forces; "guerrilla warfare"; "partisan forces";conducted with or marked by hidden aims or methods; "clandestine intelligence operations"; "cloak-and-dagger activities behind enemy lines"; "hole-and-corner intrigue"; "secret missions"; "a secret agent"; "secret sales of arms"; "surreptitious mobilizati;under the level of the ground; "belowground storage areas"; "underground caverns";beneath the surface of the earth; "water flowing underground";in or into hiding or secret operation; "the organization was driven underground"; Hyponyms: Maquis
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