careful的名词是carefulness，具体释义如下：
读音：[ˈkeəflnəs]
表达意思：仔细；慎重。
词性：通常在句中作名词，作为主语或宾语。
固定搭配：life carefulness 生命关怀；carefulness and hardworking 吃苦耐劳；Responsibility and carefulness 认真负责 ; 做事细心。
例句：
1、In spite of his premeditated carefulness, the floor would now and then creak.
尽管他事先策划周密，但地板还是会不时吱嘎作响。
2、He is full of vigor but fails in carefulness.
他劲头很足，但不够仔细。
3、The boy is appreciated by his teacher for his carefulness in his homework.
这个男孩因为功课做得认真而受到老师的称赞。
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