undergroundEnglish

An electric railway operating below the surface of the ground (usually in a city)

English: metro, tube, underground, subway system, subway

A secret group organized to overthrow a government or occupation force

English: underground, resistance

Bahasa: ketahanan, rintangan, daya tahan

Conducted with or marked by hidden aims or methods

English: clandestine, cloak-and-dagger, hole-and-corner(a), hugger-mugger, hush-hush, secret, surreptitious, undercover, underground

Bahasa: sulit, tersembunyi, rahsia

Under the level of the ground

English: belowground, underground

In or into hiding or secret operation

English: underground

Beneath the surface of the earth

English: underground