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.
Everyone was appalled by his arrogant and presumptuous attitude.
His haughty and insolent remarks soured the atmosphere of the meeting.
傲慢 is a more common word for arrogance or haughtiness, while 尊大不遜 is a stronger, more literary compound emphasizing both arrogance and insolence.
不遜 means insolence or disrespect; 尊大不遜 combines this with 尊大 (haughtiness) to intensify the meaning.
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.