insecurity
noun/ˌɪnsɪˈkjʊrɪti/
Frequency rank: #7,138 most common English word
Meaning
a feeling of uncertainty or lack of confidence in oneself.

Example sentence
She tried to hide her insecurity about her appearance by always smiling confidently.
Synonyms & related words
- self-doubt
- anxiety
- uncertainty
- diffidence
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