B1
someone who takes care of your child while you are out
Dictionary examples:
Our babysitter quit after my son turned his pet hamster into a superhero. (0.0)
The babysitter found my son trying to teach our goldfish to bark. (0.0)
The babysitter caught my son trying to teach our cat algebra. (0.0)
I promised the babysitter that we'd be home by midnight. (35.8)