noun, noun or participle which takes 'suru'
lover's whispers; sweet nothings
Romantic or intimate murmuring between lovers; often used with する to describe the act of whispering sweet nothings.
二人は公園のベンチで喃語を交わしていた。
The two were exchanging sweet nothings on a park bench.
電話で一時間
They whispered sweet nothings on the phone for a whole hour.
noun
baby babble; babbling
The cooing or babbling sounds made by infants before they learn to speak; used in developmental contexts.
生後六ヶ月の赤ちゃんが喃語を話し始めた。
The six-month-old baby started babbling.