To disregard basic human relations and moral principles; unfilial and disloyal; rebellious against traditional moral norms.
他一向行事任性，不听劝告，对待师长也缺乏基本的尊重，这种无父无君的态度让人难以接受。
He always acts willfully, disregards advice, and lacks basic respect for his teachers; such an unfilial and disrespectful attitude is unacceptable.
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