rockaby

/ˈrɑkəˌbaɪ/
interjection
  1. A word used in lullabies to soothe a baby to sleep, often in the phrase 'rockaby baby'.
    • The old lullaby began with 'Rockaby, rockaby, little one.'
    • She sang softly, 'Rockaby, sweet child, close your eyes.'
    • Rockaby, baby, in the treetop.
What does "rockaby" mean? | whatsthatwordmean | whatsthatwordmean