The quality or state of being demonstrative; the tendency to show feelings and emotions openly and expressively.
From demonstrative + -ness (noun-forming suffix). The root Latin demonstrativus evolved from demonstrare (to show), with the suffix -ness added to convert the adjective to an abstract noun denoting a quality.
Demonstrativeness is what makes extroverts tick—some people are born to hug, gesture wildly, and express every feeling openly, while others keep everything buttoned up. This word names that personality trait perfectly.
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