confident (adj.)

1570s, "self-reliant, sure of oneself;" c. 1600, "fully assured, having strong belief," from French confident, from Latin confidentem (nominative confidens) "firmly trusting, reliant, self-confident, bold, daring," present participle of confidere "to have full trust or reliance," from assimilated form of com, here perhaps an intensive prefix (see com-), + fidere "to trust" (from PIE root *bheidh- "to trust, confide, persuade"). Related: Confidently.

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Definitions of confident from WordNet

confident (adj.)
persuaded of; very sure;
was confident he would win
Synonyms: convinced / positive
confident (adj.)
having or marked by confidence or assurance;
a confident speaker
his manner is more confident these days
confident of fulfillment
a confident reply
confident (adj.)
not liable to error in judgment or action; "most surefooted of the statesmen who dealt with the depression"- Walter Lippman; "demonstrates a surefooted storytelling talent"- Michiko Kakutani;
Synonyms: surefooted / sure-footed