pestilential

Of or relating to pestilence or plague.

1675, John Dryden, The Mistaken Husband, London: J. Magnes and R. Bentley, Act V, p. 63, What do you fear? Why do you shun me thus. […] I am not Pestilential, nor Leaprous.

[…] the Winter keen Pour’d out his Waste of Snows, and Summer shot His pestilential Heats:

Of or relating to pestilence or plague.

A long sicknesse will weary friends at last; but a pestilentiall sicknes auerts them from the beginning.

[…] the miseries of famine were succeeded and aggravated by the contagion of a pestilential disease.

Of or relating to pestilence or plague.

pestilential fever; pestilential sweating

The Scab, the Stench, and the Burning are terrible pestilential Symptoms,

Of or relating to pestilence or plague.

Now this pestilentiall Summer being well spent, upon the approach of the Winter, and decrease of the Sicknesse, the King […] drawes nearer to the City of London,

They must expect more Pestilential times, That lives in th’ Equinoctial of their Crimes;

Having a harmful moral effect (especially one that is believed to spread in the manner of pestilence).

But as the Poisons of the deadliest kind Are to their own unhappy Coasts confin’d, […] So Presby’try and Pestilential Zeal Can only flourish in a Common-weal.

By proclaiming individuals or entire societies to be damned, by treating their convictions as pestilential heresies, church and state had deliberately loosed fanaticism and savagery on often helpless men.