ppl. a. (UN-1 10.)

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1768–74.  Tucker, Lt. Nat. (1834), I. 628. To turn his steps into the way that … unslackening prudence would have led.

2

1793.  W. Roberts, Looker-on, No. 85 (1794), III. 371. After an unslackening course of … fasting, mortification, and watchfulness.

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1836.  Keble, in Lyra Apost. (1849), 18. Faster each hour, on Time’s unslackening gale, The dreaming world drives on.

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1848.  Mill, Pol. Econ., I. xi. § 1. There is no obstacle to an increase of production … of unslackening rapidity.

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