The Collaborative International Dictionary of English v.0.48:
Uncomeatable \Un`come*at"a*ble\, a. Not to be come at, or reached; inaccessible. [Colloq.] --Addison. [1913 Webster] My honor is infallible and uncomeatable. --Congreve. [1913 Webster]WordNet (r) 3.0 (2006):
un-come-at-able adj 1: difficult to reach or attain [syn: un-come-at-able, un-get-at-able, ungetatable]