To keep something secret.
保持某事秘密。 (Bǎochí mǒu shì mìmì.)
"I’ll tell you a secret, but keep it under your hat."
"我会告诉你一个秘密，但保密。" (Wǒ huì gàosù nǐ yīgè mìmì, dàn **bǎomì**.)
a perfect couple, very well suited for each other
to discuss something without reaching a conclusion
to stop working for the day
To relax and not worry too much.
a sudden and significant progress
later than planned or expected
