Underground

Adjective

 * 1)  Below the ground; below the surface of the Earth.
 * There is an underground tunnel that takes you across the river.
 * 1) Hidden, furtive, secretive.
 * These criminals operate through an underground network.
 * 1) Of music, art, etc, outside the mainstream.

Synonyms

 * subterranean
 * clandestine, hidden, hush-hush, secret
 * avant-garde, unconventional

Adverb

 * 1) Below the ground.
 * The tunnel goes underground at this point.
 * 1) Secretly.

Synonyms

 * below ground
 * clandestinely, in secret, on the quiet

Noun

 * 1)  An underground railway.
 * 2)  A movement or organisation of people who resist political convention.
 * 3)  A movement or organisation of people who resist artistic convention.

Synonyms

 * metro, métro, subway , Tube
 * resistance
 * avant-garde, counter-culture

Verb

 * 1) To route electricity distribution cables underground

Thesaurus
Amtrak, Charley, L, Trojan horse, VC, Vietcong, abstruse, agreement to disagree, alienated, alienation, alternative, antiestablishment, apostasy, at odds with, at rest, at variance with, avant-garde, back door, back stairs, back way, back-door, backstairs, baggage train, beclouded, behind the curtain, behind the scenes, behind the veil, blind, bolt-hole, branch, breakaway, buried, bushfighter, bushwhacker, cable railroad, cable railway, casual, choo-choo, clandestine, close, clouded, cog railroad, cog railway, collaborationist, collaborator, concealed, counter-culture, covered, covert, covert way, covertly, crypto, deep-buried, difference, differing, disaccord, disagreeing, disagreement, disapprobation, disapproval, disparity, dissatisfaction, dissension, dissent, dissentience, dissentient, dissenting, dissidence, dissident, diversity, dropping out, eclipsed, el, electric, electric railway, electric train, elevated, elevated railway, embankment, escalier derobe, escape hatch, escape route, experimental, express, express train, extremists, feeder, feeder line, feline, fellow traveler, fifth column, fifth columnist, flier, fraternizer, freight, freight train, freighter, funicular, furtive, goods train, gravity-operated railway, guerillas, guerrilla, hid, hidden, hidlings, hole-and-corner, horse railway, hugger-mugger, in a cloud, in a corner, in a fog, in a whisper, in darkness, in eclipse, in hidlings, in opposition, in purdah, in secret, in the background, in the dark, in the wings, incommunicado, insurgents, insurrectionists, interurban, irregular, junction, latent, light railroad, lightning express, limited, line, local, main line, maquis, maquisard, metro, milk train, minority opinion, monorail, mysterious, nobody the wiser, nonagreement, nonassent, nonconcurrence, nonconforming, nonconformist, nonconformity, nonconsent, obfuscated, obscure, obscured, occult, opposing, opposition, parliamentary, parliamentary train, partisan, passenger train, private, privy, quiet, rack railway, rack-and-pinion railroad, rack-and-pinion railway, radical, rail, rail line, railroad, railroad train, railway, rattler, recondite, recusance, recusancy, recusant, rejection, repudiation, resistance, resistance fighter, resting in peace, revolutionary, roadbed, roadway, rolling stock, saboteur, secession, secluded, secluse, secret, secret exit, secret passage, secret staircase, secretly, sectarian, sectary, security risk, sequestered, shifty, shuttle, shuttle train, side door, sidetrack, siding, skulking, slinking, slinky, sly, sneaking, sneaky, sotto voce, special, stealthy, streamliner, street railway, streetcar line, sub rosa, subterranean, subterraneous, subversive, subversives, subway, sunken, surreptitious, switchback, terminal, terminus, track, train, tram, tramline, trestle, trolley line, trunk, trunk line, tube, turnout, under an eclipse, under cover, under house arrest, under the breath, under the rose, under wraps, under-the-counter, under-the-table, undercover, underfoot, underground fighter, underground railroad, underground route, underhand, underhanded, unknown, unobtrusive, variance, way train, with bated breath, withdrawal, wrapped in clouds

Adjective

 * Chinese:
 * Mandarin:
 * Czech:
 * Dutch:
 * Esperanto:
 * Finnish:
 * French: ,
 * German: unterirdisch, Untergrund-
 * Greek:


 * Icelandic:
 * Italian: ,
 * Portuguese: ,
 * Romanian: subteran
 * Russian: подземный
 * Serbo-Croatian: podzemno
 * Spanish: ,
 * Yiddish:


 * Chinese:
 * Mandarin:
 * Dutch:
 * Finnish:
 * French:, , ,


 * Greek: ,
 * Italian: clandestino
 * Russian: подпольный
 * Serbo-Croatian: prikriveno, potajno


 * Chinese:
 * Mandarin: 非主流
 * Finnish:
 * French:


 * German: Untergrund-
 * Greek:
 * Russian: андерграунд
 * Serbo-Croatian: podzemno

Adverb

 * Chinese:
 * Mandarin:
 * Finnish: maan alla
 * French: sous terre, sous la terre
 * German: unter der Erde, unterirdisch


 * Greek: υπόγεια
 * Icelandic:
 * Italian:
 * Navajo:
 * Russian: под землёй

Noun

 * Finnish:
 * French: résistance, mouvement clandestin , organisation clandestine
 * German: Untergrundorganisation
 * Italian: resistenza, movimento clandestino , organizzazione clandestina


 * Portuguese: organização clandestina
 * Russian: подполье
 * Spanish: movimiento clandestino, organización clandestina


 * French: l'underground, mouvement d'avant-garde
 * Italian: l'underground


 * Russian: андерграунд

Adjective

 * 1)  outside the mainstream

Noun

 * 1) the underground people who resist artistic convention

Noun

 * 1) the underground people who resist artistic convention