What is the meaning of pestiferous?

adjective

• Contaminated with infecting organisms."dirty wounds"; "obliged to go into infected rooms- Jane Austen
  • synonyms: dirty
• Likely to spread and cause an epidemic disease.
  • usage: "a pestilential malignancy in the air- Jonathan Swift; "plaguey fevers"
  • synonyms: pestilent, pestilential, plaguey
• Tending to corrupt or pervert.
  • synonyms: corruptive, perversive
• Causing irritation or annoyance.
  • usage: "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"
  • synonyms: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguy, plaguey, teasing, vexatious, vexing