にこにこ

にこにこ
adverb
smiling; beaming
1. smiling; beaming
Describes a happy, gentle smile that shows contentment or friendliness.
彼女(かのじょ)はいつもにこにこしている。
She is always smiling.
にこにこ()みながら挨拶(あいさつ)した。
I greeted them with a smile.
(あか)ちゃんがにこにこしている。
The baby is smiling happily.
にこにこ(がお)で「おはよう」と()った。
With a smiling face, they said 'good morning.'
()どもたちはプレゼントをもらって、にこにこしながら(はし)って()った。
The children received their presents and ran off with big smiles.

にこにこ is a 擬態語(ぎたいご) (mimetic word) that describes a warm, gentle, continuous smile showing happiness or friendliness.

COMMON PATTERNS:

  • にこにこする: to smile (ongoing state)
  • にこにこ(がお): a smiling face
  • にこにこしながら: while smiling
  • にこにこと(はな)す: to talk with a smile

SIMILAR SMILE WORDS:

  • にっこり: a single bright smile (one-time action, often warm)
  • にやにや: grinning, smirking (can imply mischief or something suspicious)
  • にたにた: smirking unpleasantly (negative nuance)
  • ほほえむ: to smile (verb, more literary)

NUANCE:
にこにこ always has a positive, warm nuance. It suggests a genuine, pleasant smile — never sarcastic or forced. Commonly used to describe children, friendly people, and pleasant interactions.