surreptitious

a. 鬼鬼祟祟的,保密的

Characterized by stealth; surreptitious.

秘密的偷偷摸摸的；鬼鬼祟祟的

His surreptitious behaviour naturally aroused suspicion.

他那鬼鬼祟祟的行为自然引起了旁人的怀疑。