This is the 1952nd most frequent Chinese word.
曰
"曰" means "to say" or "to state."
In this classical usage, '曰' serves as a formal verb meaning 'to say' or 'to speak'.
孔子曰:学而时习之,不亦说乎?
Confucius said: Learning and practicing frequently, isn't it also joyful?
Here, '曰' is used in a formal context to introduce a citation or saying from an authoritative source.
古书曰:天下为公,选贤与能。
Ancient scriptures state: The world is for everyone, and the capable and virtuous are chosen.
In this sentence, '曰' introduces a literary quotation, a common function in written Chinese.