croon
verb
[ kruːn ]
• hum or sing in a soft, low voice, especially in a sentimental manner.
• "she was crooning to the child"
croon
noun
• a soft, low voice or tone.
• "he sang in a gentle, highly expressive croon"
Origin:
late 15th century (originally Scots and northern English): from Middle Low German and Middle Dutch krōnen ‘groan, lament’. The use of croon in standard English was probably popularized by Robert Burns.
