lullaby
lull-a-by · noun
Definitions
noun
- 1.
A quiet, gentle song sung to send a child to sleep.
- 2.
(figurative) Something that has a soothing, sleep-inducing quality.
Forms
plural: lullabies
Related words
Etymology
From lull (to soothe) + bye (as in "bye-bye" or "good-bye"), formed in English in the 16th century.