pestiferous

Adjective
  1. Contaminated with infecting organisms (synset 302121576)
    "dirty wounds"; "obliged to go into infected rooms"
    similar to: infected, septic - containing or resulting from disease-causing organisms
    same as: dirty
  2. Likely to spread and cause an epidemic disease (synset 301430206)
    "a pestilential malignancy in the air"; "plaguey fevers"
    similar to: epidemic - (especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously
    same as: pestilent, pestilential, plaguey
  3. Tending to corrupt or pervert (synset 301135866)
    similar to: evil - morally bad or wrong
    same as: corruptive, perversive
  4. Causing irritation or annoyance (synset 300090253)
    "tapping an annoying rhythm on his glass with his fork"; "aircraft noise is particularly bothersome near the airport"; "found it galling to have to ask permission"; "an irritating delay"; "nettlesome paperwork"; "a pesky mosquito"; "swarms of pestering gnats"; "a plaguey newfangled safety catch"; "a teasing and persistent thought annoyed him"; "a vexatious child"; "it is vexing to have to admit you are wrong"
    similar to: disagreeable - not to your liking
    same as: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguey, plaguy, teasing, vexatious, vexing

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