plaguey
adverb
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in a disagreeable mannerβit's so plaguey cold!βdisagreeably
adjective
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causing irritation or annoyanceplaguyvexingannoyingbothersomegallingirritatingnettlesomepeskypesteringpestiferousteasingvexatious
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likely to spread and cause an epidemic diseasepestiferouspestilentpestilential