The quality or state of being gluttonous; excessive greed for food or indulgence.
From 'gluttonous' plus the suffix '-ness' (from Old English '-nes'), which creates nouns expressing qualities or states. This follows the pattern of 'happiness,' 'kindness,' and 'sadness.'
The '-ness' suffix is English's favorite way to turn adjectives into abstract nouns—it's so productive that you can theoretically add it to almost any adjective, creating instant nouns for any quality you want to discuss.
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