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demeanor

[dih-mee-ner]
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noun
  1. conduct; behavior; deportment.
  2. facial appearance; mien.
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Also especially British, de·mean·our.

Origin of demeanor

First recorded in 1425–75, demeanor is from the late Middle English word demenure. See demean2, -or1

Synonyms

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manner, comportment, bearing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for demeanor

n.

late 15c., from obsolete Middle English demean "handle, manage, conduct," later "behave in a certain way" (early 14c.), from Old French demener (11c.) "to guide, conduct; to live, dwell," from de- "completely" (see de-) + mener "to lead, direct," from Latin minare "to threaten," in Late Latin "to drive (a herd of animals);" see menace. Sense in English evolved from notion of "conduct, manage" (oneself). Spelling changed by influence of nouns in -or, -our.

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Online Etymology Dictionary, © 2010 Douglas Harper