B1
to look after someone's child in their home while they are not there
Dictionary examples:
I babysit for free pizza, but the kids always eat it all first. (0.0)
I babysit for my neighbors, but their cat thinks it's babysitting me. (0.0)
They asked me to babysit their goldfish. I'm not sure what to do. (0.0)
I babysit for Jane on Tuesday evenings. (16.5)