adverb (fukushi); adverb taking the 'to' particle; noun or participle which takes the aux. verb suru
sweetly (smiling); broadly (grinning)onomatopoeic or mimetic wordsee also ニコニコ
Generated: This meaning is used to describe a soft and pleasant smile, often associated with warmth and positivity. It conveys an endearing or friendly demeanor.
Lingaku