The state, realm, or characteristic quality of being cocksure; arrogant overconfidence treated as a unified condition or territory.
From 'cocksure' + '-dom' (a suffix meaning state, realm, or domain, as in 'kingdom' or 'boredom'). Creates a noun describing the world or condition of cocksureness.
This delightfully obscure word treats overconfidence like a kingdom or realm—imagine 'cocksuredom' as the ridiculous empire ruled by people who are completely wrong but totally convinced they're right.
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