/ˌʌndəˈgraʊnd/

• 1  adj. [below ground] lurpeko, lur azpiko

• 2  adj. [secret, illegal] klandestino, isilpeko, ezkutuko, sasiko

• 3  adv. [below ground] lurpean, lur azpian

• 4  adv. [in hiding] klandestinitatean, sasian

• 5  n. (Br) [railway system] metro

• 6  n. [activist movement] mugimendu klandestino

• 7  n. [subculture, alternative movement] underground

  underground culture: underground kultura