Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: pestiferous  pe'sti-fu-rus
  1. Contaminated with infecting organisms
    "pestiferous wounds";
    - dirty
  2. Likely to spread and cause an epidemic disease
    - pestilent, pestilential, plaguey
  3. Tending to corrupt or pervert
    - corruptive, perversive
  4. Causing irritation or annoyance
    "tapping a pestiferous rhythm on his glass with his fork";
    - annoying, bothersome, galling, irritating, nettlesome, pesky [informal], pestering, plaguy, plaguey, teasing, vexatious, vexing, irksome, niggly, dratted [informal]

See also: disagreeable, epidemic, evil, infected, septic