noxious

adj.

1. Harmful to living things; injurious to health: noxious chemical wastes.
2. Harmful to the mind or morals; corrupting: noxious ideas.

[Middle English noxius, from Latin, from noxa, damage.]

noxiously nox'ious·ly adv.
noxiousness nox'ious·ness n.

adjective

Extremely destructive or harmful: baneful, deadly, malignant, pernicious, pestilent, pestilential, virulent. See help/harm/harmless.

adj

Definition: deadly, injurious
Antonyms: curing, good, healthy, helpful, hygienic, innocuous, pleasant, pure, sterile, wholesome

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(nok′shus)
adj

Hurtful; not wholesome.

Hurtful; injurious; pernicious.

• n. gases — those encountered in nature include ammonia, hydrogen sulfide, methane, sulfur dioxide; industrial intoxicants include ammonia, carbon monoxide, cyanide, and a variety of toxic smokes and fumes.

IN BRIEF: Physically harmful.

The toad has indeed no superior as a destroyer of noxious insects... treat him with utmost hospitality. — Celia Thaxter (1835-1894) American writer on gardening, from An Island Garden, 1894.

Dansk (Danish)
adj. - skadelig, usund

Nederlands (Dutch)
schadelijk, giftig

Français (French)
adj. - nocif, délétère

Deutsch (German)
adj. - giftig, schädlich

Ελληνική (Greek)
adj. - βλαβερός, επιβλαβής, επιζήμιος

Italiano (Italian)
nocivo

Português (Portuguese)
adj. - nocivo, insalubre

Русский (Russian)
вредный, пагубный

Español (Spanish)
adj. - nocivo, perjudicial

Svenska (Swedish)
adj. - skadlig, osund, ohälsosam

中文（简体）(Chinese (Simplified))
有害的, 精神不健全的, 有毒的

中文（繁體）(Chinese (Traditional))
adj. - 有害的, 精神不健全的, 有毒的

한국어 (Korean)
adj. - 해로운, 불건전한

日本語 (Japanese)
adj. - 有害な, 有毒な, 不健全な, 体に悪い

العربيه (Arabic)
‏(صفه) منار, سام‏

עברית (Hebrew)
adj. - ‮מזיק, רע‬

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