ニ
 
ヤ
 
ニ
 
ヤ

adverb, adverb taking the と particle, takes する

Onomatopoeic or mimetic word.
  1. grinning, smirking.

Variations

Pronunciation Kanji Kana Is Common
 
ニ
 
ヤ
 
ニ
 
ヤ
ニヤニヤ ✔
 
に
 
や
 
に
 
や
にやにや ✔