Hubris
Etymology
From Greek “hybris” (insolence, outrage), which in classical usage meant an act of violent presumption, often against the gods. In Greek tragedy such overweening pride provoked nemesis, the retribution that restored the order the hero had violated. English keeps the tragic arc: hubris is pride with a fall built into it.
noun · /HYOO-bris/
Excessive pride or self-confidence that invites downfall.
What it names
The overreaching arrogance of believing yourself beyond limits, rules, or consequences — right up until you aren’t.
Example
It was pure hubris to launch the product with no testing, and the recall that followed proved it.
Related idea
Healthy confidence is calibrated to real ability; hubris is confidence untethered from reality, the kind that ignores warnings because it cannot imagine being wrong.