niko-niko
A warm, genuine smile that radiates happiness. The kind of beaming face that makes everyone around feel good too.
💡A child opening birthday presents — 'She was niko-niko the whole time!'
おばあちゃんはいつもにこにこしている。
Grandma is always smiling niko-niko.
The baby was ___ at everyone in the room.
赤ちゃんはみんなに○○していた。