Plague
Chamber's Etymological of the English Language · 1895 · p. 391
plug, v. any great natural evil a deadly epidemic or pestilence anything troublesome. v.t. to infest with disease or calamity: to trouble:- pr p. plug'umg pa and pa.p. plagued. [L. plaga, a blow, stroke, cog. with Gi PtegP, p/is so, to strike Plagua-mark, plug'- mark, Plague-spot, plfig'-spot, «. a work or spot of plague or foul disease.
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