looking after a baby; taking care of a baby; babysitting; babysitter
用事があるので姉に子守を頼んだ。
I asked my sister to babysit because I have errands.
子守をしながら家事をした。
I did housework while babysitting.
子守唄を歌って寝かせた。
I put the baby to sleep by singing a lullaby.