にっこり
nikkori

Suru Verb
To-Adverb

1. sweetly (smiling); broadly (grinning)

Onomatopoeia
Related to ニコニコ
彼女 かのじょ わたくし てにこりとさえしなかった。
kanojowa watashio mite nikoritosae shinakatta
She did not so much as smile at me.
Other forms: