also: むき
noun, na-adjective
Describes a person or behavior that lacks shame or moral scruples. Often used in literary or formal contexts. Can function as a noun or adjectival noun (e.g., 無愧な).
彼の無愧な態度には呆れてしまった。
I was appalled by his shameless attitude.
無愧の振る舞いは周囲の反感を買う。
Brazen behavior invites resentment from those around you.
Composed of 無 (without) and 愧 (shame, remorse). The reading むぎ is the standard on'yomi; the alternate reading むき is likely a variant or historical reading.