noun

self-confidence

self-confidence, self-assurance

She has a lot of self-confidence.

She has a lot of self-confidence.

His self-confidence grew over time.

His self-confidence grew over time.

to have self-confidence to feel sure about your own ability. She has a lot of self-confidence.

Synonyms: assurance, poise; Antonyms: insecurity, self-doubt

A compound of 'self' (one's own person) and 'confidence' (trust, belief). Literally, 'trust in oneself'.

Break it down: it's the 'confidence' you have in your 'self'.

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