noun
hubris
HYOO-bris/ˈhjuːbrɪs/
Excessive pride or self-confidence that can lead to failure.
Her refusal of the trolley shows hubris as the stack of plates begins to topple.

Etymology
Greek hybris described insolence and outrage, originally presumption toward the gods. This connects excessive self-confidence with overstepping proper limits, rather than simply feeling proud.
In context
is that not the epitome of hubris to think that you can improve on systems that are so miraculous and so complex
More examples
- The disaster exposed the company’s hubris.
- She mistook confidence for hubris.
- The tragedy turns on the ruler’s fatal hubris.
Forms
hubris