definition of
pestiferous

[1] #1 pestiferous s. [dirty] contaminated with infecting organisms; "dirty wounds"; "obliged to go into infected rooms"- Jane Austen. wn

[2] #2 pestiferous s. [corruptive, perversive] tending to corrupt or pervert. wn

[3] #3 pestiferous s. [annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguy, plaguey, teasing, vexatious, vexing] causing irritation or annoyance; "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 m. wn