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Webster 1913 Edition

Adj.

Not cognizable; incapable of being recognized, known, or distinguished.

H. Spenser.

The Lettish race, not a primitive stock of the Slavi, but a distinct branch, now become

incognizable

Tooke.

Adj.

incon'izable. [in and cognizable.]

That cannot be recognized, known or distinguished.

The Lettish race, not a primitive stock of the Slavi, but a distinct branch, now become incognizable--

incognizable ‎(comparative more incognizable, superlative most incognizable)

Not cognizable; incapable of being recognised.

(Can we find and add a quotation of H. Spenser to this entry?)

The Lettish race, not a primitive stock of the Slavi, but a distinct branch, now become incognizable. — Tooke.