If someone displays a strong sense of probity, that means they have strong morals and uphold the principles of right and wrong. “Probity” comes from the Latin “probus,” meaning “honest, good.” It’s an old-fashioned term, more likely to be found in 18th-century correspondence than in modern conversation. Charles Dickens used it in the novel “Little Dorrit” in the context of a character raising funds thanks to friends believing in his goodness: “This sum … he had, through the promptitude of several friends who had a lively confidence in his probity, already raised, with the exception of a trifling balance of one pound seventeen and fourpence.”