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The Collaborative International Dictionary
Unvaluable

Unvaluable \Un*val"u*a*ble\, a.

  1. Invaluable; being beyond price. [Obs.]
    --South.

  2. Not valuable; having little value. [R.]
    --T. Adams.

Wiktionary
unvaluable

a. 1 (context obsolete English) invaluable; beyond price. (16th-18th c.) 2 (context rare English) Not valuable; having little value. (from 17th c.)