sneak

US /sniːk/
UK /sniːk/
1.

lén lút

to go somewhere secretly, or to take someone or something somewhere secretly:

:
I managed to sneak in through the back door while she wasn't looking.
1.

lén lút

a person who tells people in authority when someone else does something bad:

:
You told Mrs. Cooper that it was me who tipped the paint over, didn't you - you nasty little sneak!
1.

lén lút

done secretly:

:
The unit launched a sneak attack under cover of night.