1. plural of dumbness; the quality or state of being unable to speak
Usage: archaic or literary use
2. plural of dumbness; the quality or state of being stupid or lacking intelligence
Usage: informal

Examples

• The dumbnesses of his repeated mistakes frustrated his teacher.
• She was struck by the dumbnesses evident in the poorly written report.
• His various dumbnesses in social situations made him unpopular.
• The dumbnesses of the plan became apparent only after implementation began.
• Critics pointed out the dumbnesses in the proposed legislation.