Temerity is being so confident or bold that it may come across as foolish or reckless.(noun)
An example of temerity is when you question your boss about a decision he was clearly proud of having made.
See temerity in Webster's New World College Dictionary
Origin: ME temeryte < L temeritas < temere, rashly, blindly < IE base *tem-, dark > OS thimm, dark, L tenebrae, darkness
See temerity in American Heritage Dictionary 4
Origin: Middle English temerite
Origin: , from Old French
Origin: , from Latin temeritās
Origin: , from temere, rashly.
Learn more about temerity