impermeable - Master This Word
Master this word with our 5-step learning method – Learn English in English
impermeable Word Meanings
- not allowing liquid or gas to pass through
- unable to be penetrated
- figuratively means unchangeable or unaffected
impermeable Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
impermeable Phonetic & Pronunciation
UK
/ɪmˈpɜːmiəbl/
US
/ɪmˈpɝːmiəbl/
impermeable Word Etymology
Root: 'im-' (not) + 'permeable' (able to be passed through). Origin: Latin 'impermeabilis' → Old French → English. Memory image: Imagine a heavy rain hitting a raincoat that keeps you perfectly dry, representing the idea of being completely sealed off from outside elements.
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
Impermeable describes materials or barriers that do not allow liquids or gases to pass through. In science, an impermeable membrane blocks water or air, while in everyday language it can refer to anything that resists penetration, such as a raincoat, a sealant, or a policy that cannot be easily altered. The term supports both physical and figurative uses: you might say a treaty is impermeable to change, or that someone has an impermeable resolve. Common collocations include impermeable membrane, impermeable coating, and be impermeable to X. The word comes from im- (not) + permeable (able to be passed through), from Latin imperméabilis through Old French into English, with a mental image of a storm that cannot penetrate.
Usage Reminders
- Keep it for things that truly block passage
- Not the same as waterproof for clothing
- Often paired with membrane or coating
- Can be used metaphorically for stubborn resistance
- Opposite of permeable
Common Misconceptions
- Confusing impermeable with waterproof
- Thinking it means unable to be penetrated by all substances
- Assuming porous materials can be impermeable
- Using it to describe opaque rather than blocking
- Only applying it to liquids, not gases
Thinking Differences
English learners often think impermeable only means waterproof for clothes; remember it covers pushback against both liquids and gases, and can apply metaphorically to resistance to change.
Learning Tips
- Practice with physical objects (coat, membrane) to recall the meaning
- Compare impermeable with waterproof to see nuance
- Note its figurative uses (resilience, stubbornness)
- Watch for be impermeable to + X constructions
- Remember opposite is permeable
- Sound out im- prefix as not-
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of 'impermeable'?
A.Not allowing liquid to pass through
B.Allowing everything to pass through
C.Easily penetrable
D.Absorbing liquid quickly
Step 2: Usage
Choose the correct usage of 'impermeable' in a sentence.
A.The pastry was impermeable, refusing to bake properly.
B.Her personality was impermeable, making her unapproachable.
C.The fabric is impermeable to water, keeping you dry.
D.His arguments were impermeable, convincing everyone.
Step 3: Similar Words
Which word is most similar to 'impermeable'?
A.Leaky
B.Waterproof
C.Absorbent
D.Porous
Step 4: Opposite Words
What is the opposite of 'impermeable'?
A.Permiable
B.Fragile
C.Solid
D.Rigid
Step 5: Mastery
Can you think of a real-life context where a material is 'impermeable'?
A.A sponge soaking up water while cooking.
B.A waterproof jacket that keeps you dry in rain.
C.A porous rock that absorbs moisture from the ground.
D.A towel drying off after a shower.
Want to practice more words?
Download LexiTalk app for personalized learning experience
Download App