secret

secretとは　意味・定義・例文

Adjective 形容詞

1. that must not be told to or known by other people

秘密の, 内密の, 極秘の

There is a secret door into the basement.

Noun 名詞

1. something that is kept hidden by others

秘密, 内密, 秘密ごと

This is a secret between you and me.