IdiomBody & SensesEnglish

by word of mouth

Meaning: The informal, verbal passing of information from one person to another.

Example: “The little café never advertises; it grew entirely by word of mouth.”

Equivalents in other languages

Origin: "Mouth" itself traces back to Old English mūð, and pairing it with "word" to mean spoken rather than written communication is old enough that the Oxford English Dictionary's earliest citation, from the writer Reginald Pecock, dates to around 1456. A clearer, more deliberate use turns up a century later in Nicholas Udall's play Ralph Roister Doister (c. 1553): "a little message unto hir by worde of mouth," specifically distinguishing a spoken message from a written one. The phrase has needed no updating since — news and reputation still travel person to person exactly the way it describes.

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