insecurity
n. C / Un. a feeling of not being confident about yourself or your abilities. It can also describe a situation that is not safe or stable, like when you worry about losing your job.
n. a lack of confidence or assurance in oneself, or a state of vulnerability to danger, harm, or instability.
She tried to hide her insecurity by talking too much.
Rising inflation has led to widespread food insecurity in the region, leaving many families unsure of their next meal.
His aggressive management style was largely a projection of his own deep-seated insecurity about his lack of formal qualifications.
Borrowed from Medieval Latin īnsēcūritās. By surface analysis, insecure + -ity.
Uncountable when referring to the general state; countable when referring to specific doubts or fears. Often followed by the preposition 'about'.