1. In a furtive manner
   "the soldiers were furtively crawling through the night"
   - on the sly

See also: furtive

Encyclopedia: Furtively

• incoordination
• incorporate
• incorporated
• incorporation
• incorporative
• incorporeal
• incorporeality
• incorrect
• incorrectly
• incorrectness
• incorrigibility
• incorrigible
• incorrigibly
• incorrupt
• incorruptibility
• incorruptible
• incorruptibly
• incorruption
• incorruptness
• increase
• increased
• increasement
• increasing
• increasing monotonic
• increasingly