The quality or state of being crippled; the degree or extent of disability or lameness.
From cripple + -ness suffix (used to form abstract nouns describing qualities or states), a straightforward English suffix formation.
Crippleness abstracts disability into a measurable quality, which is interesting linguistically—it turns a condition into a *thing* you can evaluate, reflecting how 19th-century medicine tried to quantify and rank disabilities on various scales.
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