As a teenager she would 'sneak' out (of her house/apartment) at night to visit her boyfriend.
I'm going to 'sneak' a smoke. [=I'm going to smoke a cigarette while nobody is watching]
She took a 'sneak peek' [=a secret look] at the birthday presents hidden in the closet.
(..) I used to think you were the cleverest man alive. ARYA: You used to be taller. JON: How did you sneak up on me? How did you survive a knife through the heart? I didn't. You still have it. Needle. (..)2019 TvShow: Game of Thrones Title: Winterfell Season: 8 Episode 1