baby-sit

from WordNet (r) 3.0 (2006)

baby-sit
    v 1: take watchful responsibility for; "I baby-sit the
         neighbor's plants when she is out of town"
    2: work or act as a baby-sitter; "I cannot baby-sit tonight; I
       have too much homework to do" [syn: {baby-sit}, {sit}]

from The Collaborative International Dictionary of English v.0.48

baby-sit \baby-sit\ v.
   act as a baby-sitter

   Syn: babysit, sit
        [WordNet 1.5] babysitter