cautious: implies the exercise of forethought or prudence usually prompted by fear of danger: a ~ driver.


circumspect: stresses prudence, discretion, vigilance, and the surveying of all possible consequences before acting or deciding: the panel must be ~ in assigning blame.   (discreet谨慎: 指言行小心，目的是不让太多人知道careful about not allowing something to be known by too many people, 如a discreet way to handle the problem谨慎处理问题(不让太多人知道)，如very discreet about her personal life谨慎不透露个人生活）


wary: emphasizes suspiciousness and alertness in watching for danger and cunning in escaping it: be ~ of those claiming to have all the answers.   cunning巧妙，灵巧微妙


chary: implies a cautious reluctance to give, act, or speak freely: I am ~ of signing papers I have not read.


cautious谨慎: 指因害怕危险而审慎思考，circumspect慎重: 表示谨慎小心，考虑各种后果才做决定，wary留神小心: 强调警惕防范和躲避风险，chary谨慎不愿意: 因为谨慎而不愿意说或做


记忆方法: 1）首字母CCWC从未出错<==因为谨慎                "谨"本义小心，《说文》: 谨，慎也，引申为郑重地、恭敬地， "慎"是由"心"和"真"组成的会意字，也表示"小心"，谨慎互释，如许慎《说文解字》：慎，谨也，如武则天《臣轨》中"忧患生于所忽，祸害兴于细微。人不慎密者，多有终身之悔。故言易泄者，召祸之媒也。事不慎者，取败之道也"  

         2）练习一下

         3）谨慎的意思是面对危险风险时警惕小心mean prudently watchful and discreet in the face of danger or risk.首字母CCWC从未出错<==因为谨慎