poisonous - Master This Word
Master this word with our 5-step learning method – Learn English in English
poisonous Word Meanings
- capable of causing illness or death if ingested or absorbed
- having a toxic effect
- harmful or destructive
poisonous Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
poisonous Phonetic & Pronunciation
UK
/ˈpɔɪ.zən.əs/
US
/ˈpɔɪ.zən.əs/
poisonous Word Etymology
poisonous = poison (root) + -ous (suffix indicating 'full of'). Origin: Latin 'venenum' → Old French 'poisoun' → English. Imagine a toxic plant, its vibrant colors hiding a lethal potion.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputEnglish Brain Route
I pick up a leaf and move it into the light, watching how the surface changes under the lamp. I notice a sharp scent and adjust my grip, keeping the leaf away from my eyes. I set it down gently and decide to keep a safe distance until I know it's safe. The word poisonous drifts into my mind as a quiet nudge to tread carefully in what I touch.
Real Context
Poisonous is an English adjective describing something that can cause illness or death if ingested, inhaled, or absorbed. It emphasizes inherent toxicity, as in a poisonous plant or a poisonous gas, rather than being poisoned by something external. Compare poisonous with poisonous looking plants whose bright colors warn of danger; with venomous creatures that inject poison via fangs rather than through ingestion. The word is built from poison plus the suffix -ous meaning full of; its history traces back through Old French poisoun to Latin venenum. Learners should note the common collocations: poisonous substance, poisonous gas, poisonous snake, and phrases like highly poisonous or mildly poisonous to express degrees. Avoid confusing with poison as a noun or with poisonousness.
Usage Reminders
- Do not confuse poisonous with poison as a noun. Remember that poisonous describes inherent toxicity. Use highly poisonous for very dangerous items. Poisonous is not the same as venomous. When describing gas or plants, choose poisonous rather than venomous. Pair with common collocations for precision.
Common Misconceptions
- Poisonous always means deadly
- If something is poisonous it must be a poison
- All poisonous things are harmful if touched
- Venomous and poisonous are interchangeable
- A plant that looks dangerous is always poisonous
Thinking Differences
The English concept of poisonous centers on inherent toxicity of an object rather than a state of being poisoned by someone else. Learners often think all toxic things are poisonous or that all poisonous items are deadly, which leads to overuse of the word in everyday safety warnings.
Learning Tips
- Learn the core meaning and contrast with poison as a noun.
- Pair with substance and gas to describe toxic items.
- Note the difference from venomous which injects venom.
- Use highly poisonous for very dangerous things.
- Practice with everyday items to avoid overuse.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of 'poisonous'?
A.Bright
B.Happy
C.Quick
D.Deadly
Step 2: Usage
In which of the following sentences is 'poisonous' used correctly?
A.The sunny day made her feel poisonous.
B.The poisonous painter created a masterpiece.
C.She walked the dog in the poisonous park.
D.He ate the poisonous apple and got sick.
Step 3: Similar Words
Which word is a synonym of 'poisonous'?
A.Toxic
B.Healthy
C.Harmless
D.Joyful
Step 4: Opposite Words
Which word is an antonym of 'poisonous'?
A.Deadly
B.Venomous
C.Harmful
D.Safe
Step 5: Mastery
In which situation would the word 'poisonous' be most appropriate?
A.A safety manual for children's toys
B.A gardening guide on how to grow flowers
C.A recipe book for baking cookies
D.A warning sign on a bottle of bleach
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