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Use "winsomeness" in a sentence
"Sam — sometimes I think it has a really pernicious undercurrent: not that winsomeness is the only behavior the authors can conceive of, but that it’s the only positive one."
"Ordinarily there was a suspicion of hardness in her face but there was also upon occasions a kind of winsomeness, an unexpected peeping out of a personality which was like the wraith of the child which she once had been -- a suggestion of girlish charm and spontaneity utterly unlike her usual self."
"It did not disturb her faith in the winsomeness she took for granted being irresistible."