utterly devoid of human nature; completely inhuman; heartless; brutal.
那个歹徒的行径真是全无人性，竟然对无辜的孩子下狠手。
The villain's actions were utterly inhuman, actually harming innocent children.
Era:
Modern
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During the Sui Dynasty, Emperor Wen of Sui, Yang Jian, appointed Yang Guang, the son of Empress Dugu, as the crown prince.
However, Yang Guang was solely focused on becoming emperor and showed no regard for his father. He openly flirted with his father's concubines and even long-term occupied Consort Chen, another of his father's concubines. He behaved recklessly in the imperial court, and even Emperor Wen himself was powerless to control him.
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