croon
verb (used without object)
to sing or hum in a soft, soothing voice.
Used to describe an ongoing action or state that is currently taking place in the immediate present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Soft and low is the little one's breath While yet I am crooning so softly and low— Unheeding the moments as swiftly they fly, with By, by, O baby, dear baby by.
From Grandma's Memories by Mary D. Brine