anhydrous - Master This Word
Master this word with our 5-step learning method – Learn English in English
anhydrous Word Meanings
- containing no water
- dry or devoid of water
- of substances that lack water content
anhydrous Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
anhydrous Phonetic & Pronunciation
UK
/ænˈhaɪdrəs/
US
/ænˈhaɪdrəs/
anhydrous Word Etymology
Root decomposition: 'an-' (without) + 'hydro' (water). Historical origin: Greek 'anhydros' → Latin 'anhydrus' → English. Memory image: Imagine a dry desert where all the water has evaporated, representing 'anhydrous' substances that exist completely without moisture.
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 InputReal Context
Anhydrous is an adjective used to describe substances that contain no water. In chemistry and pharmaceutical contexts, it signals that a material has been dried or never absorbed moisture, which can affect reactions, storage, and potency. The term often labels solvents, reagents, and crystalline salts that must remain dry to perform correctly. The opposite is hydrated or damp, which means water is present. The etymology traces to an- meaning without and hydro meaning water, dating back to Greek anhydros. In everyday science writing, you will see phrases like anhydrous ethanol, anhydrous sodium sulfate, or anhydrous ammonia, each requiring careful handling to avoid moisture uptake.
Usage Reminders
- - Anhydrous modifies nouns, typically in lab contexts.
- - It denotes no water content, not just general dryness.
- - It contrasts with hydrated or damp substances.
- - Use with solvents, reagents, and salts that must stay moisture-free.
- - Handle and store properly to avoid moisture uptake.
Common Misconceptions
- Confusing anhydrous with simply dry: dry materials can still contain trace moisture, while anhydrous means no water content.
- Assuming it only applies to liquids; solids and gases can also be anhydrous.
- Thinking it is a general property of cleanliness rather than a chemical property.
- Equating anhydrous with hydrated; hydrated means water is present.
- Believing no water ever exists in real samples; many lab stocks are moisture-sensitive but not perfectly dry.
Thinking Differences
Explain to an English speaker: emphasize that anhydrous is a strict technical term meaning no water content, used mainly in lab contexts and with materials that must stay moisture-free.
Learning Tips
- Visualize a dry environment to memorize 'without water'.
- Link an- prefix to 'without' and hydro to water.
- Practice with common pairs: anhydrous vs hydrated.
- Read product labels on chemicals to see how the term is used.
- Create flashcards for typical solvents and reagents.
- Test yourself with real-world lab packaging.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of 'anhydrous'?
A.Lacking water
B.Containing water
C.Having a liquid form
D.Being very moist
Step 2: Usage
Which sentence uses 'anhydrous' correctly?
A.During an experiment, the scientist used anhydrous reagents in the reaction.
B.The anhydrous dessert was rich in cream.
C.She felt very anhydrous after drinking a lot of water.
D.The anhydrous landscape was filled with lush greenery.
Step 3: Similar Words
Which word is a synonym of 'anhydrous'?
A.Liquid
B.Wet
C.Dry
D.Saturated
Step 4: Opposite Words
What is the antonym of 'anhydrous'?
A.Freezing
B.Moist
C.Solid
D.Vacuum
Step 5: Mastery
Can you think of a real-life context for 'anhydrous'?
A.After the anhydrous reaction, the substance turned into a useful product.
B.The weather was perfect for a picnic as it was neither too dry nor too humid.
C.She decided to hydrate her skin after a long day outside in the sun.
D.The flowers flourished in the moist soil after the rain.
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