無恥|むちmuchi[1]atamadaka (head-high)

1. na-adjective, nounshameless

• Synonym恥知らずはじしらずNeutralListed as an antonym by mistake: it means the same as 「無恥」, shamelessness, only more colloquial.
• Synonym破廉恥はれんちNeutralImplies shameless, indecent conduct, as in 「破廉恥な行為」, carrying moral condemnation; often used of scandals.
• Synonym鉄面皮てつめんぴWrittenA written word for being utterly thick-skinned; strong in tone, it stresses complete indifference to shame.
• Related図々しいずうずうしいNeutralMeans thick-skinned and pushy; the most common everyday choice, as in 「図々しい人」.
• Related傍若無人ぼうじゃくぶじんNeutralA four-character idiom for behaving as if no one were around; it stresses outrageous, high-handed conduct rather than shamelessness.
• Related厚かましいあつかましいNeutralMeans being brazen or cheeky, as in 「厚かましいお願い」; common in everyday speech.
• Related不埒ふらちNeutralOld-fashioned word for outrageous conduct that defies rules; it stresses violating morality and decency.
• Related白々しいしらじらしいNeutralDescribes knowingly feigned behavior, as in 「白々しい嘘」; it stresses hypocrisy and insincerity.
• RelatedいけずうずうしいCasualAn emphatic colloquial form of 「図々しい」 with a harsher, more insulting tone.
• Related臆面もないおくめんもないNeutralA set phrase meaning completely unashamed, as in 「臆面もなく自慢する」.
• Related厚顔こうがんWrittenA written word for brazenness; it commonly combines with 「無恥」 in the compound 「厚顔無恥」.
• Related図太いずぶといNeutralMeans bold and thick-skinned, and can be praise or criticism, as in 「図太い神経」.

「無恥」 leans written and often appears in the compound 「厚顔無恥」. For everyday talk about shamelessness pick 「恥知らず」, for thick-skinned behavior 「図々しい」 or 「厚かましい」, and for shameless scandals 「破廉恥」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. はじとも思おもわないこと。恥はじ知しらず。