Also 6–8 weakner. [f. WEAKEN v. + -ER1.] One who or something that weakens.

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1589.  L. Andrewes, Serm., Lent, i. (1629), 268. If this Ego, be not Saul, but David. David, which giveth strength vnto the Pillers; and not Saul, an empairer or weakner of them.

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1694.  [S. Bethel], Provid. God (ed. 2), 94. There being no such Traitors to the Strength of a Land, Underminers and Weakners thereof, as are unreformed Provocations.

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a. 1716.  South, Serm. (1727), VI. xi. 397. Fastings and Mortifications … which … rightly managed, are … great weakners of Sin.

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1817.  Coleridge, Biog. Lit. (1907), I. iii. 35. Averrhoes’ catalogue of Anti-Mnemonics, or weakeners of the memory.

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1870.  Emerson, Soc. & Sol., viii. (1883), 161. The crowds and centuries of books are only … echoes and weakeners of these few great voices of Time.

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