The quality, state, or degree of being gigantic; enormous size or scale.
Formed from 'gigantic' by adding the suffix '-ness' (quality or state of). This noun allows the adjective to function as a concept, similar to 'darkness' from 'dark' or 'kindness' from 'kind.'
The '-ness' suffix is one of English's oldest and most productive ways to nominalize adjectives—it's been doing this job since Old English and still works perfectly for creating abstract nouns from any adjective!
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