Tom gizlice gece dışarı çıktı ve Mary'ye evlilik yıl dönümleri için büyük bir demet çiçek aldı. - Tom snuck out and surreptitiously bought Mary a big bunch of flowers for their wedding anniversary.
A surreptitious action is done secretly. He made a surreptitious entrance to the club through the little door in the brick wall = furtive + surreptitiously sur·rep·ti·tious·ly Surreptitiously Mark looked at his watch. done secretly or quickly because you do not want other people to notice
Done or made by stealth, or without proper authority; made or introduced fraudulently; clandestine; stealthy; as, a surreptitious passage in an old manuscript; a surreptitious removal of goods
marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a lurking prowler"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"; "someone skulking in the shadows"