C1 noun /ɪnˈædɪkwəsi/
inadequacy
неадекватность
Meaning
lack of sufficient ability, quality, or strength; a feeling of not being good enough
Example
She struggled with feelings of inadequacy at work despite her strong qualifications.
Несмотря на хорошие квалификации, она испытывала чувство неадекватности на работе.