The quality or state of being given to excessive drinking or drunkenness; habitual intemperance.
From crapulous with the noun suffix -ness, creating an abstract noun. The -ness suffix is one of English's most productive ways of converting adjectives into nouns describing qualities.
While 'crapulency' describes the immediate state of being drunk, 'crapulousness' implies a character flaw—the habitual tendency toward excess. Medieval moralists would have used this to condemn chronic drunkards.
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