こそこそ
kosokoso

Suru Verb
To-Adverb

1. sneakily; secretly; stealthily; on the sly

Onomatopoeia
Related to こっそり
かげでこそこそせず めん かって かれにそれを いういたまえ。
kagede kosokoso sezu mento mukatte kareni soreo iitamae.
Say it to his face, not behind his back.
Other forms: