Insecure
Synonyms: Unconfident, lacking self-confidence, diffident, self-conscious, uncertain, doubtful, hesitant, retiring, shy, timorous, passive, introverted, fearful, worried, mousy, lacking confidence, not self-assured, self-effacing, unforthcoming, unsure, self-doubting, unassertive, shrinking, timid, meek, inhibited, anxious, apprehensive, and ill at ease.
Example Sentences
She felt insecure about her appearance.
He seemed insecure during the presentation.
The insecure foundation caused structural problems.
An insecure leader often avoids direct confrontation.
They were insecure about their abilities.