A variant spelling or abbreviation of the letter M, or sometimes an interjection representing a hesitant sound.
Directly from the English letter M, with doubled letters sometimes used in older texts or informal writing to indicate prolongation or emphasis.
The 'm' sound as 'em' or 'emm' is one of English's most versatile interjections—we use it to express hesitation, thinking, doubt, or agreement, making it a true linguistic Swiss Army knife.
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