資料來源 : pyDict

偷偷地;暗暗地

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Furtively \Fur"tive*ly\, adv.
   Stealthily by theft. --Lover.

資料來源 : WordNet®

furtively
     adv : in a furtive manner; "the soldiers were furtively crawling
           through the night" [syn: {on the sly}]