babysit · verb I or T /ˈbeɪ.bi.sɪt/
babysit
B1 to look after someone's child in their home while they are not there
Dictionary example:
I babysit for Jane on Tuesday evenings.
Learner example:
As you know I am [an] au pair in London and I sometimes [have] to babysit [i]n the evening. (Preliminary English Test; B1; French)