inarticulable en · ADJ
Etymology
First attested in 1825: formed as in- + articulable; compare inarticulate and the slightly earlier (1824) French inarticulable.
Meanings
-
(not-comparable) Not articulable; incapable of being articulated.
I add two letters to this class, under the title of anomalous, which are the Arabic qaf (incorrectly written g, in the Plate, instead of q,) and the Hebrew, or Arabic ain, which some suppose to be inarticulable by a European voice.
1825, James Silk Buckingham, editor, The Oriental Herald and Journal of General Literature, volume 6, page 103: