a. Obs. [f. prec. + -ABLE.] Calculated to astonish, surprising, wonderful.

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1603.  Harsnet, Pop. Impost., xix. (title), 110. The Astonishable power of Nick-names.

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1657.  Reeve, God’s Plea, 276. Men have rare endowments, and astonishable demeanour.

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