こそっと

adverb

stealthily; secretly; on the sly

Mimetic adverb describing a quiet, sneaky action done so as not to be noticed. Similar to こっそり but with a slightly lighter, quicker feel.

See also: こっそり · こそこそ

• 彼かれはこそっと部屋へやを抜ぬけ出だした。

  He slipped out of the room stealthily.

• こそっとお菓か子しをつまむ。

  I sneak a snack on the sly.