na-adjective, noun
Describes a person or attitude that looks down on others; often carries a negative connotation of overbearing pride.
彼の高慢な態度がみんなを不快にさせた。
His arrogant attitude made everyone uncomfortable.
成功しても高慢になってはいけない。
Even if you succeed, you must not become haughty.
Compound of 高 (high) and 慢 (pride, arrogance). The exact historical derivation is uncertain, but the kanji combination directly suggests an elevated sense of self-importance.