undergrounder

汉语翻译

n. 在地面下工作的人, 秘密组织成员, 地下铁道乘客

英语解释

形容词 underground:

under the level of the ground同义词：belowground, undergroundconducted 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