The personal quality of being straightforward and direct in one's manner(noun)
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Use "downrightness" in a sentence
"Add to this proud blindness the better quality of great downrightness in speaking the truth, and the love of fair play, on all occasions, and, moreover, the peculiarity which is alleged of the Englishman, that his virtues do not come out until he quarrels."
"Schilsky, in leaping down, pushed carelessly against him, he returned the knock so rudely and swore with such downrightness that, in spite of his hurry, Schilsky stopped and fixed him, and with equal vehemence damned him for a fool of an Englishman."
"On the other hand, the Erewhonian system lends itself better to the suppression of that downrightness which it seems the express aim of Erewhonian philosophy to discountenance."