noun, na-adjective
Refers to a state or act that brings loss of honor or public shame. Often used in formal or serious contexts.
彼の不正は学校にとって不名誉なことだ。
His misconduct is a disgrace to the school.
不
I ended up with a shameful record.
汚名 also means stigma or bad reputation, but often focuses on a tainted name; 不名誉 is broader and can refer to dishonorable acts or states.
Compound of 不 (negative prefix) and 名誉 (honor, prestige). The combination straightforwardly means 'without honor'.