Capable of being avowed or openly acknowledged with confidence.(adjective)
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Use "avowable" in a sentence
"Moreover the chancellor of the exchequer saw before him an inevitable addition of ten millions of pounds sterling to his budget, the only avowable reason for which was the rectification of the Canadian frontier."
"It would not be an avowable reason that we hoped Wilde would write new plays and books, would it?"
"When a man of his wealth and position took the trouble to pay a girl of Virginia's station such marked attention, capping the climax with this present invitation to dine at his house, either his intentions were not avowable or else he was very much in love and wanted to marry her, which last hypothesis sent a thrill down the good sister's back."