candour

 
Pronunciation: /ˈkandə/
(US candor)

noun

[mass noun]
  • the quality of being open and honest; frankness: a man of refreshing candour

Origin:

late Middle English (in the Latin sense): from Latin candor 'whiteness'. The current sense dates from the mid 18th century; the development of the senses paralleled that of candid

Spelling help

The ending of candour is -our (the spelling candor is American).