The quality or state of being dishonorable; shameful or disgraceful character or conduct.
From 'dishonorable' (dis- + honorable) plus the noun-forming suffix '-ness' (from Old English '-ness'). This abstract noun formation allows the adjective's meaning to function as a concrete concept.
In military tradition, 'dishonorableness' was so serious that 'dishonorable discharge' was worse than imprisonment—it permanently marked a person as unfit for civil society in ways that sound almost medieval to modern ears.
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