candour
noun [ U ] UK (US candor) uk/ˈkæn.dər/ us/ˈkæn.dɚ/
（尤指对棘手或难堪话题的）坦白，直率，坦诚
the quality of being honest and telling the truth, especially about a difficult or embarrassing subject
"We really don't know what to do about it," she said with surprising candour. “我们确实不知道该如何应付，”她以令人吃惊的坦率说道。
See also: candid