a. [UN-1 7 b.]

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  1.  Incapable of being drained dry; inexhaustible.

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1611.  Cotgr., Inespuisable,… vndraynable, which cannot be dryed vp, or laden dry.

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1627.  J. Carter, Plain Expos., 108. Your heauenly Father,… The undrainable Fountaine of all goodnesse.

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1652.  J. Wright, trans. Camus’ Nat. Paradox, I. 6. A very plentiful and almost undreinable source of riches.

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1842.  Tennyson, Œnone, 113. Overflowing revenue … from labour’d mines undrainable of ore.

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  2.  Incapable of being freed from water by means of draining.

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1852.  Henfrey, Veget. Europe, 181. Parts … irreclaimable to cultivation … being either steep arid slopes of the hills or undrainable bogs.

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1884.  Harper’s Mag., April, 761/1. Undrainable or undrained … surfaces.

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