NOXIOUS
noxious
(adjective) injurious to physical or mental health; “noxious chemical wastes”; “noxious ideas”
Source: WordNet® 3.1
Etymology
Adjective
noxious (comparative more noxious, superlative most noxious)
Harmful; injurious.
Usage notes
• Nouns to which "noxious" is often applied: substance, chemical, fume, gas, odor, plant, weed, animal, stimulus, stimulation.
Synonyms
• harmful
• injurious
• scathel
• see also harmful
Source: Wiktionary
Nox"ious, a. Etym: [L. noxius, fr. noxa harm; akin to nocere to harm,
hurt. Cf. Nuisance, Necromancy.]
1. Hurtful; harmful; baneful; pernicious; injurious; destructive;
unwholesome; insalubrious; as, noxious air, food, or climate;
pernicious; corrupting to morals; as, noxious practices or examples.
Too frequent an appearance in places of public resort is noxious to
spiritual promotions. Swift.
2. Guilty; criminal. [R.]
Those who are noxious in the eye of the law. Abp. Bramhall.
Syn.
– Noisome; hurtful; harmful; injurious; destructive; pernicious;
mischievous; corrupting; baneful; unwholesome; insalubrious. See
Noisome.
– Nox"ious*ly, adv.
– Nox"ious*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition