surreptitious

surreptitious adj.

暗中的, 秘密的, 偷偷摸摸的

英英解釋:形容詞surreptitious:
1. marked by quiet and caution and secrecy; taking pains to avoid being observed
同義詞：furtive, sneak, sneaky, stealthy
2. conducted with or marked by hidden aims or methods
同義詞：clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, undercover, underground