lullaby
lullaby
noun
/ˈlʌləbaɪ/
(plural lullabies)
a soft, gentle song sung to make a child go to sleep
She sang her baby a lullaby.
TOPICS Music
C2
TOPICS Life stages
C2
Word Origin
mid 16th cent.: from lull + bye-bye, a sound used as a refrain in lullabies; compare with bye-byes.