Unclassifiable [adjective]
Definition of Unclassifiable:
undistinguished, commonplace
Sentence/Example of Unclassifiable:
There are many other unclassifiable Numenian traces in Plotinos.
I am like to lose my mind over the capricious and harassing developments of this unclassifiable zoological freak.
A most strange and unclassifiable chamber in the palace of musical art is reserved for Beethoven's "Fidelio."
It fell somewhere between the two, as an unclassifiable phenomenon of undoubted potency.