









天知地知 is a Chinese idiom (chengyu) meaning “Known only to Heaven and Earth, implying nobody else knows”. A complete secret. Alternatively, it can mean widely known, an open secret. Literally, “Heaven knows, Earth knows”.

Turn a Chinese character or sentence into a GIF or MP4
Open the tool →
Chinese and English fill-in vocabulary worksheets
Open the tool →
Picture and word Bingo for your class
Open the tool →
Printable tracing sheets with a QR learning companion
Open the tool →天知地知 (tiān zhī dì zhī) is a Chinese idiom (chengyu) meaning “Known only to Heaven and Earth, implying nobody else knows”.
天知地知 is pronounced tiān zhī dì zhī in Mandarin Chinese.
Literally, 天知地知 means “Heaven knows, Earth knows”. It is used to mean “Known only to Heaven and Earth, implying nobody else knows”.
天知道,地知道。指人人都知道。亦指只有天知道,地知道,没有别人知道。