unclassifiable
adjective
un·clas·si·fi·able
ˌən-ˌkla-sə-ˈfī-ə-bəl
: unable to be classified : not classifiable
… unclassifiable writers like Rudyard Kipling …—George Stade
… a collection of essays, magazine pieces and unclassifiable musings …—Kate Jennings
unclassifiableness
noun
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Merriam-Webster unabridged
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