noxious
adjective
[ ˈnɒkʃəs ]
• harmful, poisonous, or very unpleasant.
• "they were overcome by the noxious fumes"
Similar:
poisonous,
toxic,
deadly,
virulent,
harmful,
dangerous,
pernicious,
damaging,
destructive,
environmentally unfriendly,
very unpleasant,
nasty,
disgusting,
awful,
dreadful,
horrible,
terrible,
vile,
revolting,
foul,
sickening,
nauseating,
nauseous,
appalling,
offensive,
foul-smelling,
evil-smelling,
malodorous,
fetid,
putrid,
rancid,
unwholesome,
unhealthy,
insalubrious,
ghastly,
horrid,
bogging,
noisome,
mephitic,
disgustful,
miasmal,
miasmic,
nocuous,
olid,
Origin:
late 15th century: from Latin noxius (from noxa ‘harm’) + -ous.