相关单词近義詞 underground 地下的, furtively 媮媮地, secretly 秘密地, slyly 狡猾的, covertly 媮媮摸摸地, stealthily 暗地裡, on the sly 秘密地, secretively 穩秘地, sneakily sneaky的副詞形式...臨近詞surreptitious 返回 surreptitiously