poisonous
[adjective]
Synonyms:
- toxic, deadly, fatal, lethal, mortal, noxious, venomous, virulent
- evil, baleful, corrupting, malicious, noxious, pernicious

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Antonyms: antidotal
Contrasted words: corrective, countervailing, emendatory, healing, remedial
Related Words: miasmal, miasmatic, miasmic, pestilent, pestilential, deadly, fatal, lethal, mortal, baneful, deleterious, detrimental, nocuous, noxious, pernicious

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English Thesaurus: poisonous, toxic, noxious, hazardous, deadly, ...

[TahlilGaran] English Synonym Dictionary ▲

poi‧son‧ous /ˈpɔɪzənəs/ adjective

1. containing poison or producing poison:
Some mushrooms are extremely poisonous.
poisonous gases such as hydrogen sulfide
poisonous substances
She was bitten on the ankle by a poisonous snake.
poisonous to
The berries are poisonous to birds.

2. full of bad and unfriendly feelings:
the poisonous atmosphere of the office

3. British English someone who is poisonous seems to get pleasure from causing arguments, unhappiness etc:
That poisonous bastard Lucett told Morris I was seeing his wife.
—poisonously adverb

[TahlilGaran] Dictionary of Contemporary English ▲

poisonous
adj.
VERBS be | become
ADV. deadly, extremely, highly
PREP. to The leaves of yew trees are poisonous to cattle.

[TahlilGaran] Collocations Dictionary ▲

poisonous containing or producing a substance that is likely to kill you, or make you very ill:
poisonous gas
poisonous snakes
The plant is poisonous to humans and animals.
toxic toxic chemicals and waste are poisonous to people and the environment:
Crops were sprayed with highly toxic chemicals.
Lead is toxic to humans.
The site was used for the disposal of toxic waste.
noxious [usually before noun] formal noxious substances and gases are poisonous:
Vehicles pollute the air with noxious fumes
The soil may be contaminated with noxious substances.
hazardous [usually before noun] hazardous substances are likely to harm people, animals, or the environment if they are not dealt with or got rid of carefully:
Lead is one of the most hazardous substances known, causing cancer and nerve damage.
The building is now unoccupied, and all radioactive or hazardous materials have been removed.
hazardous nuclear waste
deadly extremely poisonous and likely to kill you – used especially about poisons and snakes:
a deadly poison
a deadly snake
Terrorists plotted to release a deadly gas.

[TahlilGaran] English Thesaurus ▲