undergrounder

汉语翻译

英语解释：

形容词 underground:

1. under the level of the ground
   同义词：belowground, underground
2. conducted with or marked by hidden aims or methods
   同义词：clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground