noun, noun which may take the genitive case particle 'no'
incomparably ruthless; diabolical
A rare, emphatic literary expression describing extreme cruelty or wickedness beyond comparison. Used in formal or dramatic contexts.
彼の暴悪無類な行いに、人々は言葉を失った。
People were speechless at his incomparably ruthless deeds.
A four-character compound combining 暴 (violence), 悪 (evil), 無 (without), and 類 (peer/equal), literally meaning 'violence and evil without equal'. The exact historical derivation is uncertain, but it follows a classical Chinese pattern of emphatic description.