This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The quality or state of being inaccessible; inaccessibleness.

n. The quality or state of being inaccessible; inaccessibleness.

n. The character of being inaccessible, or not to be reached or approached.

n. the quality of not being available when needed

"But inaccessibility is less to do with the difficulty of "getting into" an invented world (the antipathy to "funny names" he cites), I think, than it's to do with the difficulty of "getting into" a complex reading experience -- one which sets up contradictory emotional and intellectual responses and which therefore requires active engagement on the reader's part."

inconvenience   

inaccessibleness   

ability    acceptability    adaptability    admissibility    affordability   

brownouts    intangibility    impermanency    abstractness    untouchability