babysitter · noun C /ˈbeɪ.biˌsɪt.ər/
babysitter
B1 someone who takes care of your child while you are out
Dictionary example:
I promised the babysitter that we'd be home by midnight.
Learner example:
Write me an e-mail and I will send you the address of the family who needs a babysitter. (Preliminary English Test; B1; Italian)