superconfidence
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superconfidence — n. * * * … Universalium
superconfidence — su per•con′fi•dence n … From formal English to slang
superconfident — /supəˈkɒnfədənt/ (say soohpuh konfuhduhnt) adjective exceedingly or excessively confident. –superconfidence, noun –superconfidently, adverb …