pestiferous
adjective
pes·tif·er·ous pe-ˈsti-f(ə-)rəs 
1
: dangerous to society : pernicious
2
a
: carrying or propagating infection : pestilential
b
: infected with a pestilential disease
3
: troublesome, annoying
pestiferously adverb
pestiferousness noun
Synonyms
- abrasive
- aggravating
- annoying
- bothersome
- carking
- chafing
- disturbing
- exasperating
- frustrating
- galling
- irksome
- irritating
- maddening
- nettlesome
- nettling
- peeving
- pesky
- pestilent
- pestilential
- pesty
- plaguey
- plaguy
- rankling
- rebarbative
- riling
- vexatious
- vexing
See all Synonyms & Antonyms 
Example Sentences
a pestiferous weed that has given gardeners no end of grief
Recent Examples on the Web After the Thirty Years’ War (1618-48), the Dutch were probably eager for reminders of ordinary domestic life, even pestiferous ones, and for images of quiet and tenderness. 
Willard Spiegelman, WSJ, 18 Aug. 2017 Mr. Marín said three factors favored his coffee: the elevation, which is high enough to keep pestiferous coffee borer bugs at bay; the humidity, which stems from passing clouds that provide a steady stream of moisture; and the red soil. Gustave Axelson, New York Times, 7 Mar. 2017
Willard Spiegelman, WSJ, 18 Aug. 2017 Mr. Marín said three factors favored his coffee: the elevation, which is high enough to keep pestiferous coffee borer bugs at bay; the humidity, which stems from passing clouds that provide a steady stream of moisture; and the red soil. Gustave Axelson, New York Times, 7 Mar. 2017 Word History
Etymology
Middle English, from Latin pestifer pestilential, noxious, from pestis + -fer -ferous
First Known Use
15th century, in the meaning defined at sense 1
Medical Definition
pestiferous
adjective
pes·tif·er·ous pes-ˈtif-(ə-)rəs
1
: carrying or propagating infection : pestilential
a pestiferous insect
2
: infected with a pestilential disease
pestiferous
adjective
as in annoying
causing annoyance a pestiferous weed that has given gardeners no end of grief Synonyms & Similar Words
Relevance
- annoying
- irritating
- frustrating
- disturbing
- pestilential
- aggravating
- nettlesome
- vexatious
- exasperating
- pesty
- plaguey
- irksome
- pestilent
- maddening
- nettling
- bothersome
- pesky
- vexing
- abrasive
- carking
- rankling
- rebarbative
- riling
- plaguy
- chafing
- painful
- galling
- distractive
- peeving
- importunate
- troublesome
- displeasing
- mischievous
- biting
- importune
- burdensome
- stressful
- infuriating
- enraging
- troubling
- disquieting
- offensive
- angering
- tiresome
- inconveniencing
- discomforting
- distressing
- upsetting
- bratty
- spiny
- trying
- worrisome
- thorny
- brattish
- jangling
- grating
- jarring
Antonyms & Near Antonyms
- delightful
- pleasing
- crossed (up)
- crossed belt
- crossed nicols
- crossed off
- crossed out
- crossed over
- crossed palsy
- crossed paralysis
- crossed paths
- crossed paths (with)
- crossed paths with
- crossed specially
- crossed the rubicon
- crossed up
- crosser
- crossers
- crosses
- crosses (out)
- crosses (up)
- crosses crosslet
- crosses moline
- crosses off
- crosses out
- crosses over
- crosses paths