steal in
Advanced (C1) formal
To quietly creep into a place so no one notices you
"She stole in through the back door so as not to wake her parents."
Hear it in context
How to Shadow Native English Speakers to Master Your Pronunciation
English by Jay - Sprout · 3:02
By the way, to nick is to steal in
Isso é Esparta: guerreiros ferozes do mundo antigo – Craig Zimmer
Seja curioso — TED-Ed · 2:35
Spartan boys were encouraged to steal in order to survive,