The quality or state of being frilly; the degree to which something is decorated with or resembles frills.
Derived from 'frilly' + the noun suffix '-ness.' Formed to convert the adjective 'frilly' into an abstract noun describing the quality of having frills.
The '-ness' suffix is perhaps the most efficient tool in English—it can attach to almost any adjective to create the corresponding abstract noun (happy→happiness, sad→sadness). It's so productive that we barely notice we're creating new abstract concepts constantly.
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