incognizable

Adjective

incognizable (comparative more incognizable, superlative most incognizable)

1. Not cognizable; incapable of being recognised.
   • A dead Body is always incognizable, not only because it is ordinarily changed, but because it neither speaks, nor acts; and for that the qualities of its Soul, which we should know, are departed with her, and have left nothing but a trunk, and a lump without motion.1658, Thomas Saintserf (translator), Entertainments of the Cours: or, Academical Conversations, compiled by Melchior de Marmet, London, p. 104
   • The lettish race […] was not a primitive stock, as the finnish, the germanic, or slavonian, but a distinct branch, now become incognizable, of the Slavi […]1799, William Tooke, View of the Russian Empire during the Reign of Catharine II and to the close of the present Century, London: Longman and Rees, Volume 1, Book 2, p. 455