Refers to a person who is beyond reform or training due to inherent flaws or lack of motivation, or a situation that is so deteriorated it cannot be remedied; like trying to carve rotten wood.
小明从小顽劣，老师多次教导都无济于事，真是朽木难雕啊。
Xiao Ming has been mischievous since childhood, and despite repeated teachings from his teachers, it was all in vain. Truly, it's like trying to carve rotten wood.
Era:
Ancient
Frequency:
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Story:
During the Spring and Autumn period, Zai Yu, a disciple of Confucius, was very eloquent. Initially, Confucius was fond of him, believing he would achieve great things.
However, it wasn't long before Confucius noticed that Zai Yu frequently missed classes. When someone was sent to look for him, he was found sleeping soundly in his room.
Upon learning this, Confucius sadly remarked, "Rotten wood cannot be carved, and a wall of dirt and dung cannot be plastered."
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