曰

To speak or utter; to be called or referred to as (attribution/designation).

Functions primarily as a quotative bridge between a subject and their discourse ([Subject] + 曰 + [Quote]). In the absence of a subject, it serves as an impersonal introductory marker, acting as a colon to introduce a statement (e.g., "It is said..." or "As follows...").

Among terms for speech:

• 曰 vs. 謂 (wèi): 曰 reports the content of what was uttered; 謂 emphasizes the directionality (to whom it was said) or how something is characterized.
• 曰 vs. 言 (yán): 言 refers to "speech" or "words" in a general, abstract, or noun-based sense; 曰 is focused on the specific act of initiating a quotation.
• 曰 vs. 語 (yǔ): 語 leans toward narration and the content of discourse/language use.

In many scripts and manuscripts, this glyph is visually nearly identical to 日 (sun/day).

When encountering visual ambiguity between 曰 and 日, the distinction is semantic: if "sun" or "day" creates a logical vacuum in the sentence, the glyph should be read as 曰.