The Collaborative International Dictionary of English v.0.48:
Plague \Plague\, v. t. [imp. & p. p. Plagued; p. pr. & vb. n.
1. To infest or afflict with disease, calamity, or natural
evil of any kind.
Thus were they plagued
And worn with famine. --Milton.
2. Fig.: To vex; to tease; to harass.
She will plague the man that loves her most.
Syn: To vex; torment; distress; afflict; harass; annoy;
tease; tantalize; trouble; molest; embarrass; perplex.
Moby Thesaurus II by Grady Ward, 1.0:
56 Moby Thesaurus words for "plaguing":
aggravating, annoying, blandishment, bothering, bothersome,
buttonholing, cajolement, cajolery, cajoling, chafing, coaxing,
demanding, disquieting, distressful, distressing, disturbing,
dunning, exasperating, fretting, galling, harassing, importunate,
importunateness, importune, importunity, insistent, irking,
irksome, irritating, nagging, pesky, pestering, pestiferous,
pestilent, pestilential, plaguesome, plaguey, plying, pressing,
pressure, provoking, teasing, tiresome, tormenting, troublesome,
troubling, upsetting, urgency, urgent, urging, vexatious, vexing,
wearisome, wheedling, worrisome, worrying