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B2 noun 12分で読める

द्रव

drav
例文
解説 द्रव in your Level:
At the A1 beginner level, learners are primarily focused on basic survival vocabulary. The word द्रव (drav) might seem a bit advanced for absolute beginners, as they usually learn 'पानी' (water) or 'दूध' (milk) first. However, introducing this word early on helps build a foundation for understanding categories. A beginner should know that द्रव means 'liquid'. It is a noun, and it is masculine. The primary goal at this stage is simple recognition. If a learner sees a sign in a hospital or a basic science diagram, recognizing this word will help them understand that the topic is about liquids. Teachers might introduce it alongside basic opposites like 'ठोस' (solid). Practice should involve simple sentences like 'यह द्रव है' (This is liquid) or 'पानी एक द्रव है' (Water is a liquid). The focus is not on complex grammar but on associating the word with its English equivalent and recognizing its written and spoken form in highly simplified contexts. It is also a good opportunity to practice the pronunciation of the 'v' sound in Hindi, which is softer than the English 'v'. By mastering this word at the A1 level, learners set themselves up for easier acquisition of related scientific and formal vocabulary in the future.
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At the A2 elementary level, learners begin to construct more complex sentences and describe the world around them in greater detail. The word द्रव (drav) becomes more useful here. Learners should start using adjectives to describe the liquid. Since it is a masculine noun, they must learn to use masculine adjectives. For example, 'गर्म द्रव' (hot liquid), 'ठंडा द्रव' (cold liquid), 'लाल द्रव' (red liquid). They should also learn to use it with basic postpositions, noting that the plural oblique form is 'द्रवों'. Sentences like 'बोतल में द्रव है' (There is liquid in the bottle) or 'मुझे कुछ द्रव चाहिए' (I need some liquid) become part of their repertoire. At this stage, learners can also start differentiating it from everyday words like 'पानी' (water). They should understand that while water is a liquid, not all liquids are water. This conceptual categorization is a key part of cognitive language development at the A2 level. They might read simple texts about health, where a doctor advises drinking more fluids, and encounter this word. The goal is to move beyond simple recognition to active, albeit basic, usage in descriptive sentences and everyday scenarios where categorization of substances is necessary.
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At the B1 intermediate level, learners are expected to handle a wider variety of topics, including basic science, health, and environment. The word द्रव (drav) becomes an active part of their vocabulary in these domains. They should be able to discuss the states of matter: ठोस (solid), द्रव (liquid), and गैस (gas). They can construct sentences explaining simple processes, such as 'बर्फ पिघलकर द्रव बन जाती है' (Ice melts and becomes liquid). At this level, learners also encounter compound words and more formal texts. They should be comfortable reading short news articles or educational materials where this word is used to describe chemicals, fuels, or bodily fluids. The distinction between 'तरल' (fluid/liquid) and 'द्रव' (liquid) can be introduced, noting that 'द्रव' is often preferred in strict scientific contexts. Learners should practice writing short paragraphs about topics like the importance of water, using 'द्रव' to elevate the formality of their writing. They also need to be proficient in using the oblique plural form 'द्रवों' accurately in sentences like 'विभिन्न द्रवों को मिलाना खतरनाक हो सकता है' (Mixing different liquids can be dangerous). Mastery at B1 means confident, context-appropriate usage in moderately complex sentences.
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At the B2 upper-intermediate level, learners are aiming for fluency and the ability to understand complex, technical, or abstract texts. The word द्रव (drav) is fully integrated into their active vocabulary. They can easily comprehend and participate in discussions about physics, chemistry, medicine, and industry in Hindi. They understand the precise scientific definition of the word—a substance with a definite volume but no definite shape. At this level, learners can use sophisticated collocations like 'ज्वलनशील द्रव' (flammable liquid), 'विषाक्त द्रव' (toxic liquid), or 'पारदर्शी द्रव' (transparent liquid). They can read and summarize technical manuals, safety guidelines, or environmental reports that utilize this terminology extensively. Furthermore, they are aware of the subtle register differences, knowing exactly when to use 'द्रव' in a formal essay or presentation, and when to switch to 'पानी' or 'पीने की चीज़' in a casual conversation. They can also handle passive voice constructions commonly found in formal writing, such as 'यह द्रव प्रयोगशाला में तैयार किया गया था' (This liquid was prepared in the laboratory). B2 learners demonstrate precision, grammatical accuracy, and contextual appropriateness when using this vocabulary.
At the C1 advanced level, learners possess a deep, nuanced understanding of the Hindi language, approaching native-like proficiency. The word द्रव (drav) is used effortlessly in highly specialized and academic contexts. C1 learners can engage in complex debates about fluid dynamics, chemical engineering, or medical treatments using advanced terminology. They understand the etymological roots of the word from Sanskrit, which helps them deduce the meanings of related complex words like 'द्रवित' (liquefied) or 'द्रवीकरण' (liquefaction). At this stage, learners might also encounter the word in literary or metaphorical contexts, where the 'flowing' nature of a liquid is used to describe abstract concepts like time, emotions, or wealth, although they recognize that 'द्रव्य' is more common for wealth. They can write comprehensive academic papers or professional reports in Hindi, using 'द्रव' alongside highly formal vocabulary without any grammatical errors regarding gender agreement or case endings. They can smoothly translate complex English scientific texts into Hindi, ensuring the correct register is maintained. Their usage of the word reflects a deep cultural and intellectual engagement with the language, demonstrating an ability to express highly abstract and technical concepts with clarity and elegance.
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At the C2 mastery level, the learner's command over the word द्रव (drav) and its entire semantic field is indistinguishable from that of an educated native speaker or a subject matter expert. They are capable of reading, writing, and critiquing advanced scientific literature, legal documents regarding chemical regulations, or philosophical texts in Hindi. They understand the most subtle nuances and historical shifts in the word's usage. A C2 learner can play with the language, perhaps creating neologisms or using the word in highly original, poetic metaphors while still maintaining grammatical perfection. They are fully aware of the sociolinguistic implications of using highly Sanskritized vocabulary (like 'द्रव') versus Perso-Arabic or colloquial alternatives, and they can code-switch effortlessly depending on their audience—be it a university lecture hall, a corporate boardroom, or a literary gathering. They can explain complex scientific phenomena involving liquids to a layperson in simple Hindi, and then immediately switch to technical jargon when discussing the same topic with a peer. At this ultimate level of proficiency, the word is not just a translation of 'liquid'; it is a fully integrated conceptual tool in their Hindi linguistic repertoire, used with absolute precision, authority, and stylistic flair.
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例文
The Hindi word द्रव (drav) is a fundamental noun in the Hindi language that translates directly to the English word liquid or fluid. When we discuss the physical states of matter in science, everyday life, or philosophical contexts, this word becomes absolutely essential for clear and precise communication. Understanding the concept of a liquid is crucial because it forms the basis of our daily existence, from the water we drink to the blood flowing through our veins. In the context of Hindi vocabulary, while the word तरल (taral) is often used interchangeably in casual conversation, द्रव carries a slightly more formal, scientific, or academic weight. It is the precise term used in chemistry and physics textbooks across India to describe a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
Scientific Context
Used primarily in physics and chemistry to denote the liquid state of matter, distinct from solid (ठोस) and gas (गैस).
You will encounter this word frequently in educational settings, laboratory environments, medical discussions, and technical literature. To truly master Hindi, grasping the subtle distinctions between different registers of vocabulary is vital. Using this word demonstrates a higher level of proficiency and a deeper understanding of the language's nuances.

पानी एक पारदर्शी द्रव है।

It shows that you are not just capable of surviving in a Hindi-speaking environment, but that you can engage in complex, intellectual, and technical discussions. The beauty of learning such vocabulary lies in its ability to unlock new realms of conversation. Imagine discussing the properties of different substances, explaining a scientific phenomenon to a student, or reading a technical manual in Hindi. In all these scenarios, knowing the correct terminology is indispensable. Furthermore, the root of this word connects deeply with ancient Indian languages, specifically Sanskrit, where it implies flowing or melting. This historical connection enriches the word, giving it a timeless quality that bridges modern science with classical linguistic traditions.
Everyday Usage
While less common in street slang, it is widely understood by anyone with a middle-school education in India.
When learning a language, it is incredibly beneficial to understand not just the translation of a word, but its cultural and historical context. This holistic approach to vocabulary acquisition ensures that the word is firmly embedded in your memory, ready to be deployed accurately and confidently when the situation demands it.

रक्त हमारे शरीर का सबसे महत्वपूर्ण द्रव है।

As you continue to build your Hindi vocabulary, pay close attention to the contexts in which native speakers choose to use this specific term over its more common synonyms. Notice how it elevates the tone of the conversation, adding a layer of precision and authority. By incorporating such words into your active vocabulary, you are taking a significant step towards achieving fluency and expressing yourself with the sophistication of an educated native speaker.

विज्ञान की कक्षा में हमने द्रव के गुणों का अध्ययन किया।

The journey of language learning is paved with these small but significant discoveries, where a single word can open up a whole new perspective on how a culture categorizes and describes the physical world around us. Therefore, embrace the challenge of mastering these specialized terms, for they are the building blocks of advanced communication and the key to unlocking the full potential of your linguistic capabilities in Hindi.
Metaphorical Application
Sometimes used in literature to describe flowing emotions or situations that lack rigid structure.
By practicing the usage of this term in various sentence structures and contexts, you will solidify your understanding and ensure that it becomes a natural part of your expressive repertoire.

पारा एक ऐसा धातु है जो कमरे के तापमान पर द्रव अवस्था में रहता है।

इस द्रव को सावधानी से संभालें क्योंकि यह ज्वलनशील है।

Mastering the usage of the word द्रव (drav) in sentences requires an understanding of its grammatical properties and the contexts in which it naturally appears. As a masculine noun in Hindi, it dictates the gender of the adjectives and verbs associated with it. For instance, when describing a cold liquid, you would say 'ठंडा द्रव' (thanda drav), not 'ठंडी द्रव'. This is a crucial grammatical rule that learners must internalize to speak and write Hindi correctly.
Adjective Agreement
Always use masculine adjectives like गाढ़ा (thick), पतला (thin), or गरम (hot) when modifying this noun.
In academic and scientific writing, you will frequently see this word used in passive constructions or formal statements. For example, 'यह पदार्थ द्रव अवस्था में पाया जाता है' (This substance is found in a liquid state). This sentence structure is highly typical of textbooks and formal presentations.

जब बर्फ पिघलती है, तो वह द्रव बन जाती है।

Notice how the word seamlessly integrates into discussions about phase changes in physics. Moreover, when using prepositions (postpositions in Hindi) like 'में' (in) or 'का' (of), the word maintains its form in the singular, but in the plural oblique case, it becomes 'द्रवों' (dravon). For instance, 'विभिन्न द्रवों का मिश्रण' (a mixture of various liquids). Understanding these inflections is vital for fluid communication. Let us explore more complex sentence structures. In a medical context, a doctor might say, 'रोगी को केवल द्रव आहार देना चाहिए' (The patient should only be given a liquid diet). Here, the word acts almost like an adjective, modifying 'आहार' (diet).

इस द्रव का घनत्व पानी से अधिक है।

This flexibility allows the word to be utilized across various professional domains. Furthermore, in industrial contexts, you might hear phrases like 'ज्वलनशील द्रव' (flammable liquid) or 'विषाक्त द्रव' (toxic liquid). These collocations are essential vocabulary for anyone working in manufacturing, safety, or engineering in a Hindi-speaking region.
Verb Collocations
Common verbs used with this noun include बहना (to flow), उबलना (to boil), जमना (to freeze), and वाष्पीकृत होना (to evaporate).
It is also important to practice using the word in negative and interrogative sentences. 'क्या यह द्रव सुरक्षित है?' (Is this liquid safe?) or 'इस बर्तन में कोई द्रव नहीं है' (There is no liquid in this vessel).

रसायन विज्ञान में हम विभिन्न द्रवों की प्रतिक्रियाओं को देखते हैं।

By repeatedly exposing yourself to these diverse sentence patterns, your brain will start to intuitively grasp the syntactic rules governing the word. To truly internalize the usage, try translating English sentences containing the word 'liquid' into Hindi, ensuring you apply the correct gender, number, and case markers.

मशीन को सुचारू रूप से चलाने के लिए स्नेहक द्रव का उपयोग करें।

Over time, the formal nature of the word will feel less intimidating, and you will find yourself using it with the same ease as native speakers do in professional and academic settings.
Compound Nouns
It forms compound words like द्रव-चालित (hydraulic) and द्रव-यांत्रिकी (fluid mechanics).

अंतरिक्ष में द्रव का व्यवहार पृथ्वी से बिल्कुल अलग होता है।

The word द्रव (drav) is not something you will typically hear in a bustling vegetable market or a casual conversation at a tea stall. Instead, its natural habitat is within the walls of educational institutions, laboratories, hospitals, and industrial complexes. If you are a student in India, studying in a Hindi-medium school or university, this word will be a staple in your science classes. Physics and chemistry teachers use it constantly when explaining the states of matter, thermodynamics, and fluid dynamics.
Educational Broadcasting
Documentaries on channels like Discovery or National Geographic dubbed in Hindi use this term extensively.
You will hear sentences like 'द्रव का कोई निश्चित आकार नहीं होता, लेकिन इसका आयतन निश्चित होता है' (A liquid has no fixed shape, but its volume is fixed). This makes it an absolutely critical piece of vocabulary for anyone looking to pursue academic studies in Hindi. Beyond the classroom, the medical field is another major domain where this word is prevalent.

डॉक्टर ने मरीज को अधिक मात्रा में द्रव लेने की सलाह दी।

Doctors, nurses, and pharmacists use it when discussing patient hydration, intravenous fluids, or liquid medications. For example, a doctor might instruct a patient suffering from dehydration to 'खूब सारे द्रव पदार्थ पिएं' (drink plenty of fluid substances). In the industrial and manufacturing sectors, engineers and technicians use the word to describe lubricants, coolants, fuels, and chemical solutions. You might read warning labels on containers that say 'खतरनाक द्रव' (hazardous liquid).

फैक्ट्री से निकलने वाले अपशिष्ट द्रवों को साफ करना आवश्यक है।

Furthermore, in the realm of environmental science and geography, discussions about water resources, oceanography, and pollution frequently employ this terminology. News reports about oil spills or toxic waste dumping in rivers will almost certainly use this word to describe the pollutants.
Aviation and Automotive
Mechanics and manuals refer to brake fluid or hydraulic fluids using variations of this word.
Therefore, if you are reading a Hindi newspaper's science and environment section, you are guaranteed to encounter it.

वैज्ञानिकों ने मंगल ग्रह पर द्रव जल के प्रमाण खोजे हैं।

Even in the culinary world, though less common than words like 'पानी' (water) or 'रस' (juice), you might find it in highly formal recipes or food science articles discussing the viscosity of sauces or the liquid content of ingredients. Understanding the specific domains where this word is active helps learners categorize their vocabulary. It allows you to anticipate when you might hear it and prepares you to use it appropriately.

इस प्रयोग के लिए हमें एक रंगहीन द्रव की आवश्यकता है।

By immersing yourself in Hindi scientific literature, news broadcasts, and educational content, you will naturally become accustomed to the rhythm and context of this essential vocabulary word.
Government Reports
Official documents regarding water management and chemical regulations use this precise terminology.

हाइड्रोलिक सिस्टम द्रव के दबाव पर काम करता है।

When English speakers learn the Hindi word द्रव (drav), several common mistakes tend to emerge, primarily revolving around register, gender agreement, and confusion with similar-sounding words. The most frequent error is using it in overly casual contexts where native speakers would simply use 'पानी' (water) or 'पीने की चीज़' (something to drink). For example, asking a waiter in a restaurant, 'क्या आपके पास कोई द्रव है?' (Do you have any liquid?) sounds incredibly robotic and unnatural, akin to asking a waiter in English, 'Do you possess any fluid?'
Contextual Inappropriateness
Avoid using this word in casual dining or everyday household conversations unless specifically discussing science.
In such situations, learners should opt for more natural vocabulary. Another significant hurdle is grammatical gender. Because liquids like water (पानी) and milk (दूध) are masculine in Hindi, while tea (चाय) and coffee (कॉफी) are feminine, learners sometimes get confused about the gender of the categorical word itself.

यह एक गाढ़ा द्रव है। (Correct - This is a thick liquid.)

It is imperative to remember that द्रव is strictly a masculine noun. Therefore, adjectives modifying it must be in their masculine form. A learner might incorrectly say 'पतली द्रव' (feminine thin liquid) instead of the correct 'पतला द्रव' (masculine thin liquid). Furthermore, pronunciation can sometimes be a stumbling block. The 'v' sound at the end is a labiodental approximant in Hindi (/ʋ/), which is somewhere between the English 'v' and 'w'. English speakers often pronounce it with a hard 'v' (biting the lower lip strongly), which marks a foreign accent.

इस द्रव का रंग नीला है।

Another common mistake is confusing it with the word 'द्रव्य' (dravya), which means matter, substance, or wealth. While they share the same Sanskrit root, their meanings in modern Hindi are distinct.
Lexical Confusion
Do not confuse द्रव (liquid) with द्रव्य (matter/substance). All liquids are matter, but not all matter is liquid.
Saying 'सोना एक कीमती द्रव है' (Gold is a precious liquid) is factually incorrect unless the gold is melted. The correct term for matter or substance there would be पदार्थ or द्रव्य.

दवा को द्रव रूप में लेना आसान होता है।

By being aware of these common pitfalls, learners can refine their Hindi, ensuring their speech is not only grammatically accurate but also contextually appropriate and natural-sounding. Practice and exposure are the best remedies for these errors. Engaging with scientific texts or health articles in Hindi will provide ample examples of correct usage, helping to cement the right patterns in your mind.

प्रयोगशाला में कई प्रकार के द्रव रखे हुए थे।

Pluralization Errors
Remember that the direct plural is the same as the singular. Only use 'द्रवों' when a postposition follows.

इन दो द्रवों को आपस में मत मिलाओ।

Expanding your vocabulary means understanding the web of related words and knowing exactly when to use which term. The word द्रव (drav) has several synonyms and related concepts in Hindi, each with its own specific nuance and appropriate context. The most direct and commonly used synonym is तरल (taral).
तरल (Taral) vs द्रव (Drav)
तरल is more commonly used in everyday language and medical advice (e.g., तरल आहार - liquid diet), while द्रव is strictly scientific.
While both mean liquid or fluid, तरल is slightly more versatile and can be used in slightly less formal contexts than द्रव. For instance, a doctor might recommend a 'तरल आहार' (liquid diet) just as often as a 'द्रव आहार'. However, in a physics textbook discussing the states of matter, 'द्रव' is the standard, preferred term.

शहद एक गाढ़ा द्रव है, जबकि पानी एक पतला तरल है।

Another related word is रस (ras), which translates to juice, essence, or sap. You would use रस when talking about the liquid extracted from fruits, vegetables, or plants, but never when talking about chemicals or petroleum. Then we have words specific to water, such as पानी (paani) and जल (jal). पानी is the everyday conversational word for water, while जल is the formal, pure, and often religiously significant term. Neither of these can replace द्रव when referring to liquids in general.

सभी द्रवों में जल जीवन के लिए सबसे आवश्यक है।

Another interesting alternative is पेय (pey), which means 'beverage' or 'drinkable liquid'. If you are at a formal event or reading a menu, you might see a section for 'पेय पदार्थ' (beverages). You would not use द्रव here, as it sounds too clinical.
पेय (Pey) Context
Strictly used for liquids intended for human consumption, like juices, teas, and soft drinks.
Understanding the antonyms is equally important for building a robust vocabulary. The direct opposites of the liquid state are ठोस (thos), meaning solid, and गैस (gas), meaning gas.

पदार्थ की तीन अवस्थाएँ होती हैं: ठोस, द्रव और गैस।

When discussing transitions between states, you will frequently use these words together. For example, 'बर्फ एक ठोस है जो पिघलकर द्रव बन जाती है' (Ice is a solid that melts to become a liquid). By mapping out these synonyms, related words, and antonyms, learners can create a mental framework that allows for highly precise and articulate expression in Hindi, ensuring that the right word is chosen for the right audience and context.

तापमान कम करने पर यह द्रव ठोस में बदल जाता है।

स्राव (Sraav)
Means secretion or discharge, often used in biological contexts for bodily liquids.

पेट में पाचन के लिए कई प्रकार के द्रवों का स्राव होता है।

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レベル別の例文

1

यह एक द्रव है।

This is a liquid.

Simple demonstrative sentence with the noun.

2

पानी द्रव होता है।

Water is liquid.

Using verb 'होता है' to state a general fact.

3

मुझे द्रव चाहिए।

I need liquid.

Using 'चाहिए' for expressing need.

4

दूध भी द्रव है।

Milk is also a liquid.

Using 'भी' (also) to add information.

5

यह द्रव गरम है।

This liquid is hot.

Masculine adjective 'गरम' matching the noun.

6

वह द्रव ठंडा है।

That liquid is cold.

Demonstrative pronoun 'वह' with adjective.

7

लाल द्रव देखो।

Look at the red liquid.

Imperative sentence with a color adjective.

8

क्या यह द्रव है?

Is this a liquid?

Simple yes/no question using 'क्या'.

1

बोतल में थोड़ा द्रव है।

There is a little liquid in the bottle.

Using postposition 'में' (in).

2

यह द्रव पीने के लिए नहीं है।

This liquid is not for drinking.

Infinitive verb with 'के लिए' (for).

3

डॉक्टर ने मुझे द्रव पीने को कहा।

The doctor told me to drink liquids.

Reported speech structure.

4

फर्श पर कोई द्रव गिरा है।

Some liquid has fallen on the floor.

Present perfect tense.

5

इस द्रव का रंग नीला है।

The color of this liquid is blue.

Possessive postposition 'का'.

6

बर्फ पिघलकर द्रव बनती है।

Ice melts and becomes liquid.

Conjunctive participle 'पिघलकर'.

7

हम विज्ञान में द्रव के बारे में सीखते हैं।

We learn about liquids in science.

Postposition 'के बारे में' (about).

8

यह एक बहुत गाढ़ा द्रव है।

This is a very thick liquid.

Adjective 'गाढ़ा' (thick).

1

सभी द्रव उस बर्तन में डाल दो।

Pour all the liquids into that vessel.

Imperative with compound verb 'डाल दो'.

2

तापमान बढ़ने पर द्रव गैस में बदल जाता है।

When the temperature increases, liquid turns into gas.

Conditional clause implied by 'पर'.

3

रसायन विज्ञान की प्रयोगशाला में कई खतरनाक द्रव होते हैं।

There are many dangerous liquids in the chemistry lab.

Plural noun with adjective 'खतरनाक'.

4

मरीज को केवल द्रव आहार दिया जा रहा है।

The patient is being given only a liquid diet.

Passive voice present continuous.

5

इन दो द्रवों को आपस में मिलाना सुरक्षित नहीं है।

It is not safe to mix these two liquids together.

Oblique plural 'द्रवों' with postposition 'को'.

6

द्रव का अपना कोई निश्चित आकार नहीं होता।

A liquid does not have its own fixed shape.

Possessive construction expressing property.

7

गाड़ी के इंजन में यह द्रव डालना जरूर

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