hubristic
/hjuːˈbrɪstɪk/Definitions
1. adjective
excessively proud or arrogant, especially in a way that is considered to be a fault
“The politician’s hubristic attitude towards his popularity eventually led to his downfall.”
2. noun
a quality of being excessively proud or arrogant, especially in a way that is considered to be a fault
“His hubristic nature made it difficult for him to work with others.”