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Reference.org
Insecurity (emotion)
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<p>Insecurity is the emotion associated with a lack of <a href="/facts/Confidence/DReLXePT">confidence</a> within oneself. It is often associated with feelings of <a href="/facts/Fear/BSzreRdS">fear</a> and <a href="/facts/Uncertainty/VM9pnGvk">uncertainty</a>, especially surrounding one's abilities. The word was originally used in the psychological sense in the year 1917. It has been observed in both adults and children. The word is also associated with attachment styles. </p>