no
「否」 has other readings with different meanings.
no; the noes
no; nay
否、そうではないと私は思うよ。
No, I don't think so.
否、彼はまだ来ていないはずだ。
No, he shouldn't have come yet.
否、それは誤解だと言いたいね。
No, I want to say that's a misunderstanding.