in·se·cu·ri·ty

[in-si-kyoor-i-tee]
noun, plural in·se·cu·ri·ties.
1.
lack of confidence or assurance; self-doubt: He is plagued by insecurity.
2.
the quality or state of being insecure; instability: the insecurity of her financial position.
3.
something insecure: the many insecurities of life.

Origin:
1640–50; < Medieval Latin insēcūritās. See insecure, -ity


2. precariousness, shakiness, vulnerability.
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World English Dictionary
insecure (ˌɪnsɪˈkjʊə) [Click for IPA pronunciation guide]
 
adj
1.  anxious or afraid; not confident or certain
2.  not adequately protected: an insecure fortress
3.  unstable or shaky
 
inse'curely
 
adv
 
inse'cureness
 
n
 
inse'curity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Insecurity is always a great word to know.
So is interrobang. Does it mean:
the offspring of a zebra and a donkey.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Example sentences
It must be said that his nasty tone betrays insecurity and suggests maybe he's
  not really all that sure of himself.
But for many workers, the only thing that has increased is insecurity.
And this is to say nothing of the relatively low pay and increasing insecurity
  of the profession itself.
If a certain uncertainty was the new status quo, the insecurity was mostly
  about money.
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