ଅର୍ଥ : In a furtive manner.
ଉଦାହରଣ :
The soldiers were furtively crawling through the night.
ସମକକ୍ଷ : furtively
On the sly ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Marathi. On the sly ka matlab kya hota hai?