noun, na-adjective
arrogant and presumptuous; haughty insolence
Strongly negative literary term describing an attitude of looking down on others with excessive pride and disrespect. Often used in formal or critical descriptions of behavior.
彼の尊大不遜な態度に、周囲はあきれ返った。
Everyone was appalled by his arrogant and presumptuous attitude.
尊大不遜な発言で、会議の雰囲気が悪くなった。
His haughty and insolent remarks soured the atmosphere of the meeting.
A yojijukugo (four-character compound) combining 尊大 (haughty, arrogant) and 不遜 (insolent, disrespectful). The exact origin is uncertain, but it follows a common pattern of pairing synonymous or complementary terms for emphasis.