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crooned

verb (used without object)

to sing or hum in a soft, soothing voice: to croon to a baby.
to sing in an evenly modulated, slightly exaggerated manner: Popular singers began crooning in the 1930s.
to utter a low murmuring sound.
Scot. and North England.
1. to bellow; low.
2. to lament; mourn.

verb (used with object)

to sing (a song) in a crooning manner.
to lull by singing or humming to in a soft, soothing voice: to croon a child to sleep.

noun

the act or sound of crooning.

verb

to sing or speak in a soft low tone

noun

a soft low singing or humming

c.1400, originally Scottish, from Middle Dutch kronen “to lament, mourn,” perhaps imitative. Originally “to bellow like a bull” as well as “to utter a low, murmuring sound” (mid-15c.). Popularized by Robert Burns. Sense evolved to “lament,” then to “sing softly and sadly.” Related: Crooned; crooning.