| Adj. | 1. | pestiferous - contaminated with infecting organisms; "dirty wounds"; "obliged to go into infected rooms"- Jane Austenseptic - containing or resulting from disease-causing organisms; "a septic sore throat"; "a septic environment"; "septic sewage" | |
| 2. | pestiferous - likely to spread and cause an epidemic disease; "a pestilential malignancy in the air"- Jonathan Swift; "plaguey fevers"epidemic - (especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously; "an epidemic outbreak of influenza" | |
| 3. | pestiferous - tending to corrupt or pervertevil, wicked - morally bad or wrong; "evil purposes"; "an evil influence"; "evil deeds" | |
| 4. | pestiferous - 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 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"annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguy, vexatious, vexing, plaguey, teasing disagreeable - not to your liking; "a most disagreeable journey"; "a disagreeable old man"; "in a disagreeable mood" | |