adverb (fukushi); adverb taking the 'to' particle; noun or participle which takes the aux. verb suru
grinning; smirkingonomatopoeic or mimetic word
Forms
ニヤニヤFrequency rank: 4,578. – 4,582.
にやにやFrequency rank: 9,467. – 9,487.
Generated definitions (experimental)
grinning; smirking
This refers to a facial expression characterized by a wide smile or a smug expression, often indicating amusement, satisfaction, or sometimes secretive delight.
Lingaku