1. [ adjective ] likely to spread and cause an epidemic disease
Synonyms: pestilential plaguey plaguelike pestilent

"a pestilential malignancy in the air"- Jonathan Swift "plaguelike diseases" "plaguey fevers"

Related terms: epidemic
2. [ adjective ] tending to corrupt or pervert
Synonyms: perversive corruptive
Related terms: evil
3. [ adjective ] contaminated with infecting organisms
Synonyms: infected dirty contaminated

"dirty wounds" "obliged to go into infected rooms"- Jane Austen

Related terms: septic
4. [ adjective ] causing irritation or annoyance
Synonyms: pestering nettlesome irritating annoying galling plaguey teasing plaguy vexing vexatious pesky bothersome

"tapping an annoying rhythm" "a particularly bothersome noise" "found it galling to have to ask permission" "an irritating delay" "nettlesome paperwork" "a pesky mosquito" "swarms of pestering gnats"

Related terms: disagreeable