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ठोस

A2 adjective #4,000 most common 11 min read

ठोस

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Practice it Examples Notes & Tips ठोस in 30 Seconds

Explanation ठोस in your Level:

At the A1 level, 'ठोस' (Thos) is introduced as a simple adjective to describe physical objects that are hard and not liquid. Beginners learn it in the context of basic science—water is liquid, but ice is 'Thos'. It's a foundational word to distinguish between different types of things you can touch. For an A1 learner, the focus is on the most literal meaning: 'solid'. You might use it to describe a toy, a stone, or a piece of wood. The grammar is easy because 'Thos' doesn't change its ending. Whether you are talking about a big rock or a small bead, it remains 'Thos'. It helps you build basic descriptive sentences like 'This is solid' (Yeh thos hai). At this stage, don't worry about the metaphorical meanings; just use it for things that are firm to the touch.

At the A2 level, you start using 'ठोस' (Thos) in more common daily contexts. You will encounter it when talking about food—specifically 'solid food' (Thos aahar) for babies or when a doctor advises you on a diet. You also begin to see its use in describing materials, such as 'solid gold' (Thos sona) or 'solid wood' (Thos lakdi). This level introduces the idea that 'Thos' implies quality and authenticity. If something is 'Thos', it's not just a thin layer or hollow; it's the real deal all the way through. You can start using it to describe things in your house or items you buy. It’s also a good time to learn its opposite, 'Taral' (liquid), to help categorize the world around you in Hindi.

At the B1 level, the transition from physical to abstract begins. You will hear 'ठोस' (Thos) used in discussions, news, and school. It starts to mean 'reliable' or 'concrete'. For example, 'Thos saboot' (solid evidence) or 'Thos kaaran' (solid reason). If you are explaining why you made a decision, using 'Thos' adds weight to your explanation. It shows that your reasoning isn't just a guess; it's based on something substantial. You might also encounter it in environmental contexts like 'Thos kachra' (solid waste). At this stage, you should be comfortable using 'Thos' to describe both a heavy block of metal and a well-thought-out plan. It helps you sound more convincing and professional in your speech.

At the B2 level, 'ठोस' (Thos) becomes a tool for nuanced argumentation and professional communication. You use it to describe strategies, foundations, and contributions. A 'Thos yojna' (solid plan) is one that has been carefully vetted. You might describe someone's career or education as having a 'Thos aadhar' (solid foundation). At this level, you understand that 'Thos' carries a sense of permanence and structural integrity. You can use it to critique ideas—'Is baat ka koi thos aadhar nahi hai' (This statement has no solid basis). You are also able to distinguish it from similar words like 'Mazboot' or 'Pukka' based on the specific context of 'substance' versus 'durability'. It’s a key word for debates and formal writing.

At the C1 level, 'ठोस' (Thos) is used with academic and literary precision. You will find it in scientific journals describing the molecular properties of matter (Thos avastha ke gun) or in philosophical texts discussing the 'solidity' of existence. It is used to describe complex social structures or economic policies. For example, 'Thos arthik niti' (solid economic policy). You understand the historical and etymological weight of the word. You can use it ironically or metaphorically in creative writing to describe a person's 'Thos vyaktitva' (solid/unshakeable personality). At this stage, you are expected to use 'Thos' in collocations that are specific to various fields like law, science, and sociology without hesitation.

At the C2 level, you have a masterly command over 'ठोस' (Thos), using it to express the finest shades of meaning. You can use it in high-level diplomatic or legal discourse where the distinction between 'solid' and 'circumstantial' is critical. You appreciate the word's role in Hindi idioms and classical literature. You can discuss the 'solidity' of a poet's imagery or the 'Thos' nature of a metaphysical argument. For a C2 speaker, 'Thos' is not just a word but a concept that represents the pinnacle of reliability and material reality. You can effortlessly switch between its most technical scientific meanings and its most profound metaphorical applications, using it to add gravitas and clarity to the most complex subjects.

Practice it Examples Notes & Tips

ठोस in 30 Seconds

Thos primarily means 'solid'—referring to matter with a fixed shape and volume, like iron or rock.
It is metaphorically used for anything reliable, substantial, or concrete, such as 'solid proof' or 'solid plans'.
In daily life, it describes 'solid food' for infants or the consistency of thick yogurt.
Grammatically, it is an invariable adjective, meaning it doesn't change for gender or number.

The Hindi word ठोस (Thos) is a versatile adjective primarily used to describe the physical state of matter, but its utility extends far into the realm of abstract qualities, logical reasoning, and character assessment. At its most basic level, it translates to 'solid' in English, representing an object that has a definite shape and volume, as opposed to liquids or gases. However, for a Hindi learner, understanding 'Thos' requires looking beyond the physics textbook. It conveys a sense of density, firmness, and the absence of hollowness. When you touch a piece of granite, it is 'Thos'. When you eat a meal that isn't soup or porridge, you are consuming 'Thos aahar' (solid food). This physical attribute of being 'unyielding' and 'compact' forms the foundation for all its metaphorical uses in Hindi conversation and literature.

Physical State: Refers to matter that is not liquid or gaseous. For example, ice is the 'Thos' form of water.

लोहा एक ठोस धातु है। (Iron is a solid metal.)

In metaphorical contexts, 'Thos' is used to describe something that is reliable, well-grounded, or substantial. If a lawyer presents 'Thos saboot' (solid evidence), they mean evidence that is difficult to refute or find holes in. If a student has a 'Thos aadhar' (solid foundation) in mathematics, it means their basic concepts are very strong. It suggests a lack of fluff, deception, or weakness. This word is frequently heard in news broadcasts, academic discussions, and even in daily bargaining where one might demand a 'Thos kaaran' (solid reason) for a price hike. It implies a sense of 'pukka' (permanent/mature) but with a specific focus on the structural integrity of the idea or object being discussed.

Reliability: Used for arguments, evidence, or plans that are foolproof and dependable.

पुलिस के पास अपराधी के खिलाफ ठोस सबूत हैं। (The police have solid evidence against the criminal.)

Culturally, 'Thos' also carries a connotation of being sensible and pragmatic. A 'Thos vyakti' (solid person) is someone who is down-to-earth, reliable, and not prone to superficiality. This usage is common in professional settings where you might describe a colleague's contribution as 'Thos yogdaan' (substantial contribution). It celebrates the quality of being 'heavy' in value but 'firm' in stance. Whether you are talking about the construction of a building, the logic of a scientific theory, or the nutritional value of a meal, 'Thos' is the go-to word to signify that there is real substance involved, leaving no room for doubt or fragility.

हमें इस समस्या का कोई ठोस समाधान निकालना होगा। (We must find a solid/concrete solution to this problem.)

Nutritional Context: Commonly used when transitioning infants from milk to 'solid' foods.

बच्चे ने अब ठोस खाना शुरू कर दिया है। (The baby has now started eating solid food.)

विज्ञान में पदार्थ की तीन अवस्थाएं होती हैं: ठोस, तरल और गैस। (In science, there are three states of matter: solid, liquid, and gas.)

Using ठोस (Thos) in sentences is relatively straightforward because it functions as an adjective that does not change its form based on the gender or number of the noun it modifies. This is a relief for many Hindi learners! Whether you are talking about a 'Thos deewar' (solid wall - feminine) or a 'Thos pathar' (solid stone - masculine), the word 'Thos' remains identical. This stability makes it a 'solid' word to have in your vocabulary. It usually precedes the noun it describes, following the standard adjective-noun order in Hindi.

Describing Physical Objects: Used to emphasize the hardness or material state of an object.

यह मेज ठोस लकड़ी की बनी है। (This table is made of solid wood.)

When you want to describe an argument or a piece of information as being indisputable, 'Thos' is your best friend. It acts as an intensifier that adds weight to your claim. In sentence construction, it often pairs with nouns like 'saboot' (evidence), 'tark' (argument), 'kaaran' (reason), or 'yojna' (plan). For example, if you are debating someone and they provide a very logical point, you might acknowledge it by saying, 'Aapka tark thos hai' (Your argument is solid). This usage shifts the focus from physical density to intellectual density.

Abstract Foundations: Used to describe the strength of a plan, a relationship, or a base.

सफलता के लिए एक ठोस रणनीति की आवश्यकता है। (A solid strategy is needed for success.)

In more formal or scientific contexts, 'Thos' is used to define categories. When explaining science to a child or discussing environmental issues (like solid waste management), 'Thos' becomes a technical term. In the phrase 'Thos kachra prabandhan' (Solid waste management), it is used to distinguish from liquid sewage. Even in these technical uses, the grammar remains simple. You can also use it to describe the consistency of things, like 'Thos dahi' (thick/solid yogurt), where it implies a high quality or specific texture.

शहर में ठोस कचरा प्रबंधन की समस्या है। (There is a problem of solid waste management in the city.)

Expressing Certainty: Used when you are 100% sure about a piece of information.

मेरे पास इस बात की ठोस जानकारी है। (I have solid information about this matter.)

मकान की नींव ठोस होनी चाहिए। (The foundation of the house should be solid.)

The word ठोस (Thos) is a staple in various domains of Indian life, from the evening news to the chemistry lab. One of the most common places you will encounter this word is in the news media. Journalists frequently use it when reporting on legal cases or police investigations. Phrases like 'Thos sabooton ke abhaav mein' (In the absence of solid evidence) are common refrains in courtroom dramas and real-life reporting. It conveys the gravity and reliability required for justice. If you are watching a Bollywood thriller, the detective will likely be searching for that one 'Thos suraag' (solid clue) to crack the case.

News & Media: Used to describe evidence, clues, and official statements.

अदालत ने ठोस गवाही की मांग की है। (The court has demanded solid testimony.)

In the educational sphere, 'Thos' is introduced early in science classes. Every Indian student learns about 'Padarth ki thos avastha' (The solid state of matter). This academic grounding ensures that every native speaker associates the word with structural integrity and resistance to change. In higher education, especially in engineering or architecture, 'Thos' is used to discuss materials and structural stability. You might hear an architect discussing 'Thos deewar' (solid wall) versus 'khokhli deewar' (hollow wall) to explain soundproofing or load-bearing capacities.

Daily Life & Parenting: Used by doctors and parents regarding a child's diet or a person's health.

डॉक्टर ने मरीज को ठोस आहार लेने की सलाह दी। (The doctor advised the patient to take solid food.)

Another interesting place you hear 'Thos' is in the context of personality and character. In Indian society, a person who is 'Thos' is respected for their integrity. This isn't a formal title, but a way to describe someone who doesn't waver in their principles. You might hear an elder say, 'Woh thos vichaaron wala aadmi hai' (He is a man of solid/firm thoughts). This implies that the person is not easily influenced by fleeting trends or opinions. It’s a compliment to one's mental and moral fortitude. Even in sports, a commentator might describe a batsman's defense as 'Thos', meaning it is very difficult for the bowler to break through.

उनकी बल्लेबाजी बहुत ठोस है। (His batting is very solid.)

Environmental Discussions: Used in government campaigns about cleanliness and waste management.

ठोस अपशिष्ट प्रबंधन आज की ज़रूरत है। (Solid waste management is the need of the hour.)

सरकार ने ठोस कदम उठाने का वादा किया है। (The government has promised to take concrete/solid steps.)

One of the most frequent mistakes learners make with ठोस (Thos) is confusing it with other adjectives that mean 'strong' or 'hard'. While 'Thos' can imply strength, it specifically refers to density and the absence of gaps. A common error is using 'Thos' when 'Mazboot' (strong) is more appropriate. For example, if you want to say a person is physically strong, you should use 'Mazboot', not 'Thos'. Saying 'Woh thos aadmi hai' would imply he is made of solid material (like a statue) or has a very firm character, rather than just having big muscles.

Thos vs. Mazboot: 'Thos' is solid/dense; 'Mazboot' is strong/durable. A rope can be 'Mazboot' but it is rarely called 'Thos'.

गलत: यह रस्सी बहुत ठोस है। (Incorrect: This rope is very solid.)
सही: यह रस्सी बहुत मज़बूत है। (Correct: This rope is very strong.)

Another mistake involves the word 'Kada' (hard). 'Kada' refers to the surface texture or the difficulty of bending something. While many 'Thos' objects are also 'Kada', they aren't always interchangeable. A 'Thos' object refers to the entirety of its mass being filled. For instance, a 'Thos gola' (solid sphere) is filled all the way through, whereas a 'Kada gola' might just have a hard shell. Learners often use 'Thos' for 'hard' in a disciplinary sense (like a 'hard teacher'), but in Hindi, you would use 'Sakht' for a strict person, not 'Thos'.

Thos vs. Sakht: 'Thos' refers to substance; 'Sakht' refers to hardness or strictness.

गलत: मेरे पिता बहुत ठोस हैं। (Incorrect: My father is very solid - meaning strict.)
सही: मेरे पिता बहुत सख्त हैं। (Correct: My father is very strict.)

Lastly, learners sometimes struggle with the placement of 'Thos' in abstract contexts. They might say 'Saboot thos hai' (The evidence is solid) which is correct, but they might over-apply it to things that don't have 'substance'. For example, you wouldn't typically call a 'solid color' 'Thos rang'. In Hindi, for a solid/plain color, you would use 'Ek-rangi' or 'Sada'. 'Thos' is reserved for things that have a 'body' or 'weighty logic'. Understanding this nuance helps in sounding more like a native speaker and avoiding the 'translated English' feel.

गलत: मुझे ठोस नीली कमीज़ चाहिए। (Incorrect: I want a solid blue shirt.)
सही: मुझे सादा नीली कमीज़ चाहिए। (Correct: I want a plain blue shirt.)

Thos vs. Bhari: 'Thos' means solid/dense; 'Bhari' means heavy. Something can be 'Thos' but light (like solid Styrofoam).

गलत: यह बक्सा बहुत ठोस है, मैं इसे उठा नहीं सकता। (Incorrect: This box is very solid, I can't lift it.)
सही: यह बक्सा बहुत भारी है। (Correct: This box is very heavy.)

यह तर्क ठोस नहीं है। (This argument is not solid/substantial.)

To truly master ठोस (Thos), it's helpful to compare it with its synonyms and related terms. Hindi has a rich vocabulary for describing the state and quality of things. Depending on the context—whether you are talking about a physical object, a person's resolve, or a piece of evidence—you might choose a different word to be more precise. Understanding these nuances will elevate your Hindi from functional to fluent.

ठोस (Thos) vs. मज़बूत (Mazboot): 'Thos' emphasizes density and being filled (solid). 'Mazboot' emphasizes strength and durability. A steel chain is 'Mazboot' but not described as 'Thos' because it's made of links with gaps.

ठोस (Thos) vs. दृढ़ (Driddh): 'Driddh' is used almost exclusively for abstract concepts like determination (Driddh nishchay) or beliefs. While 'Thos' can describe an argument, 'Driddh' describes the firmness of the mind behind the argument.

उसका संकल्प बहुत दृढ़ है। (His resolve is very firm/determined.)

Another close relative is 'Pukka'. In many contexts, 'Pukka' and 'Thos' can be used interchangeably, especially when meaning 'confirmed' or 'reliable'. For example, 'Thos khabar' and 'Pukki khabar' both mean 'confirmed news'. However, 'Pukka' also has meanings related to being cooked, ripe, or made of brick/cement (like a 'Pukka makaan'). 'Thos' is more formal and scientific, whereas 'Pukka' is more colloquial and versatile in daily life.

ठोस (Thos) vs. वास्तविक (Vaastavik): When 'Thos' means 'concrete' (as in a concrete example), 'Vaastavik' (real/actual) is a close alternative. However, 'Thos' suggests the example has more weight and proof behind it.

हमें कुछ ठोस उदाहरण चाहिए। (We need some solid/concrete examples.)

In scientific terminology, 'Thos' has no real alternative for describing the state of matter. You wouldn't use 'Mazboot' or 'Driddh' to describe ice or rock in a physics context. Similarly, in the phrase 'Thos aahar' (solid food), there is no common alternative; words like 'Sakht khana' would imply the food is hard to chew, which is not the same as being 'solid' as opposed to 'liquid'. Understanding these boundaries ensures you use 'Thos' only where its specific meaning of 'filled substance' or 'undeniable weight' is required.

ठोस (Thos) vs. अचल (Achal): 'Achal' means immovable or stationary. While a 'Thos' object might be hard to move, 'Achal' specifically describes the lack of motion, often used for mountains or fixed assets (Achal sampatti).

पर्वत अचल होते हैं। (Mountains are immovable.)

How Formal Is It?

Fun Fact

While many Hindi words for science are pure Sanskrit (Tatsama), 'Thos' is so deeply embedded in common speech that it is the standard term used even in high-level physics textbooks in India.

Pronunciation Guide

UK /ʈʰoːs/

US /ʈʰoʊs/

The stress is evenly distributed on the single syllable 'Thos'.

Rhymes With

दोष (Dosh - Fault) होश (Hosh - Consciousness) जोश (Josh - Enthusiasm) कोश (Kosh - Dictionary/Cell) मोक्ष (Moksh - Salvation - near rhyme) परोक्ष (Paroksh - Indirect - near rhyme) कोस (Kos - A unit of distance) ओस (Os - Dew)

Common Errors

Pronouncing 'Th' as a soft 'th' like in 'think'. It should be a hard, aspirated retroflex 'T'.
Making the 'o' sound too short, like in 'hot'. It must be long.
Confusing it with 'Toss' in English.

Difficulty Rating

Reading 2/5

Easy to recognize as it frequently appears in news and textbooks.

Writing 3/5

Simple spelling, but requires understanding of abstract collocations.

Speaking 3/5

Retroflex 'Th' can be tricky for English speakers.

Listening 2/5

Distinct sound makes it easy to identify in speech.

What to Learn Next

Prerequisites

पानी (Water) पत्थर (Stone) मज़बूत (Strong) सबूत (Evidence) आधार (Foundation)

Learn Next

तरल (Liquid) गैस (Gas) पारदर्शी (Transparent) लचीला (Flexible) सतह (Surface)

Advanced

घनत्व (Density) विलेयता (Solubility) प्रमाणिकता (Authenticity) अकाट्य (Irrefutable) संश्लेषण (Synthesis)

Grammar to Know

Invariable Adjectives

ठोस मेज (F), ठोस पत्थर (M). The adjective 'ठोस' does not change.

Adjective Placement

ठोस सबूत (Adjective before Noun).

Postpositional influence

ठोस सबूतों (Plural oblique) - the noun changes, but 'ठोस' remains 'ठोस'.

Comparison with 'Se'

यह पत्थर लकड़ी से ज़्यादा ठोस है। (This stone is more solid than wood.)

Using 'Hona' for states

पानी ठंडा होने पर ठोस हो जाता है। (Water becomes solid upon cooling.)

Examples by Level

बर्फ ठोस होती है।

Ice is solid.

'Hoti hai' indicates a general truth.

यह पत्थर ठोस है।

This stone is solid.

'Yeh' is a demonstrative pronoun.

मेज ठोस लकड़ी की है।

The table is made of solid wood.

Adjective 'Thos' describes the noun 'Lakdi'.

लोहा एक ठोस धातु है।

Iron is a solid metal.

'Ek' means 'a/one'.

गेंद ठोस है।

The ball is solid.

Simple subject-adjective-verb structure.

क्या यह ठोस है?

Is this solid?

'Kya' at the beginning makes it a question.

यह खिलौना ठोस नहीं है।

This toy is not solid.

'Nahi' is used for negation.

ठोस चीज़ें भारी होती हैं।

Solid things are heavy.

Plural 'Cheezein' matches with 'Hoti hain'.

बच्चा अब ठोस खाना खाता है।

The baby now eats solid food.

'Khana' here acts as a noun (food).

यह हार ठोस सोने का है।

This necklace is made of solid gold.

Possessive 'ka' links 'sona' to the necklace.

दीवार ठोस ईंटों से बनी है।

The wall is made of solid bricks.

'Se bani hai' means 'is made of'.

हमें ठोस ज़मीन पर चलना चाहिए।

We should walk on solid ground.

'Chahiye' indicates suggestion/obligation.

ठोस कचरे को अलग रखें।

Keep solid waste separate.

Imperative sentence (command).

यह मूर्ति ठोस पीतल की है।

This statue is made of solid brass.

Feminine noun 'Moorti' doesn't change 'Thos'.

ठोस दही सेहत के लिए अच्छा है।

Solid (thick) yogurt is good for health.

'Sehat ke liye' means 'for health'.

क्या आपके पास कोई ठोस सबूत है?

Do you have any solid proof?

'Koi' means 'any' in this context.

पुलिस के पास ठोस सबूत हैं।

The police have solid evidence.

'Ke paas' indicates possession.

आपका तर्क बहुत ठोस है।

Your argument is very solid.

'Tark' (argument) is masculine.

हमें एक ठोस योजना बनानी होगी।

We will have to make a solid plan.

'Hogi' indicates future necessity.

उसके पास सफलता का ठोस आधार है।

He has a solid foundation for success.

'Aadhar' means foundation or basis.

यह खबर ठोस जानकारी पर आधारित है।

This news is based on solid information.

'Aadharit' means 'based on'.

सरकार ने ठोस कदम उठाने का वादा किया।

The government promised to take solid/concrete steps.

Past tense 'vaada kiya'.

ठोस ईंधन का उपयोग कम करें।

Reduce the use of solid fuel.

'Upyog' means use/utilization.

उसने अपनी बात ठोस तरीके से रखी।

He presented his point in a solid manner.

'Tareeke se' means 'in a manner/way'.

इस सिद्धांत का कोई ठोस वैज्ञानिक आधार नहीं है।

There is no solid scientific basis for this theory.

Double adjectives 'Thos' and 'Vaigyanik' describe 'Aadhar'.

कंपनी को ठोस निवेश की ज़रूरत है।

The company needs solid investment.

'Nivesh' means investment.

उसकी बातों में कोई ठोस सच्चाई नहीं दिखी।

No solid truth was seen in his words.

'Dikhi' is the past participle of 'dikna'.

हमें पर्यावरण के लिए ठोस नीतियां चाहिए।

We need solid policies for the environment.

'Neetiyaan' is the plural of 'Neeti' (policy).

ठोस कचरा प्रबंधन एक बड़ी चुनौती है।

Solid waste management is a big challenge.

'Prabandhan' means management.

उसने अपनी स्थिति को ठोस बनाया।

He made his position solid/firm.

'Sthiti' means position or situation.

यह एक ठोस और टिकाऊ समाधान है।

This is a solid and durable solution.

'Tikaau' means durable/long-lasting.

उसके पास ठोस अनुभव की कमी है।

He lacks solid experience.

'Anubhav' means experience.

ठोस अवस्था भौतिकी एक जटिल विषय है।

Solid-state physics is a complex subject.

Technical term: 'Thos Avastha Bhautiki'.

लेखक ने समाज की ठोस हकीकत को दर्शाया है।

The author has depicted the solid reality of society.

'Darshaya' means depicted/shown.

बिना ठोस प्रमाण के आरोप लगाना गलत है।

It is wrong to level allegations without solid proof.

'Pramaan' is a formal word for proof.

उसने अपनी दलीलों से एक ठोस पक्ष रखा।

He presented a solid case/side with his arguments.

'Daleel' means plea or argument.

इस परियोजना के लिए ठोस वित्त पोषण आवश्यक है।

Solid financing is essential for this project.

'Vitt Poshan' means financing.

उनकी दोस्ती का आधार बहुत ठोस है।

The foundation of their friendship is very solid.

Abstract use of 'Aadhar'.

ठोस ज्यामिति में त्रिविमीय आकृतियों का अध्ययन होता है।

Solid geometry involves the study of three-dimensional shapes.

'Trivimeeya' means three-dimensional.

वैश्विक मंदी के बावजूद भारत की स्थिति ठोस रही।

Despite the global recession, India's position remained solid.

'Baavjood' means despite.

दार्शनिक ने अस्तित्व के ठोस धरातल पर चर्चा की।

The philosopher discussed the solid ground of existence.

'Dharatal' means surface or ground.

कविता में प्रतीकों का उपयोग बहुत ठोस और गहरा है।

The use of symbols in the poem is very solid and deep.

'Prateek' means symbol.

न्यायालय ने अभियोजन पक्ष की ठोस तर्कों को स्वीकार किया।

The court accepted the solid arguments of the prosecution.

'Abhiyojan' means prosecution.

उनकी कला में एक ठोस वैचारिक स्पष्टता दिखाई देती है।

A solid conceptual clarity is visible in their art.

'Vaicharik' means conceptual.

ठोस अपशिष्ट प्रबंधन की विफलता के गंभीर परिणाम हो सकते हैं।

The failure of solid waste management can have serious consequences.

'Vifalta' means failure.

उसने अपने जीवन के अनुभवों को एक ठोस रूप दिया।

He gave a solid form to his life experiences.

'Roop dena' means to give shape/form.

वैज्ञानिकों ने इस घटना के लिए ठोस साक्ष्य प्रस्तुत किए।

Scientists presented solid evidence for this phenomenon.

'Saakshya' is a formal term for evidence.

राजनीतिक स्थिरता के लिए ठोस संस्थागत ढांचे की आवश्यकता है।

Solid institutional frameworks are needed for political stability.

'Dhaancha' means framework/structure.

Common Collocations

ठोस सबूत

ठोस आधार

ठोस आहार

ठोस कदम

ठोस योजना

ठोस कचरा

ठोस जानकारी

ठोस तर्क

ठोस नींव

ठोस ईंधन

Common Phrases

ठोस रूप देना

— To give a concrete shape or form to an idea or plan.

उसने अपने सपनों को ठोस रूप दिया।

ठोस वजह

— A solid or valid reason for something.

क्या आपके पास यहाँ न आने की कोई ठोस वजह है?

ठोस परिणाम

— Concrete or tangible results.

हमें अपनी मेहनत के ठोस परिणाम चाहिए।

ठोस स्थिति

— A firm or stable position.

बाज़ार में हमारी स्थिति ठोस है।

ठोस उदाहरण

— A concrete or solid example.

कृपया एक ठोस उदाहरण दीजिए।

ठोस प्रयास

— Substantial or sincere efforts.

सफलता के लिए ठोस प्रयास ज़रूरी हैं।

ठोस सामग्री

— Solid or substantial material.

यह किताब ठोस सामग्री से भरपूर है।

ठोस निष्कर्ष

— A solid or definitive conclusion.

हम किसी ठोस निष्कर्ष पर नहीं पहुँच पाए।

ठोस ढांचा

— A solid structure or framework.

संस्था का ढांचा ठोस होना चाहिए।

ठोस आश्वासन

— A solid or firm assurance/guarantee.

मंत्री ने ठोस आश्वासन दिया है।

Often Confused With

ठोस vs मज़बूत (Mazboot)

'Mazboot' is strong/durable. A thin but unbreakable wire is 'Mazboot', but not 'Thos'.

ठोस vs सख्त (Sakht)

'Sakht' is hard or strict. A strict teacher is 'Sakht', not 'Thos'.

ठोस vs भारी (Bhari)

'Bhari' is heavy. A hollow iron ball is 'Bhari', but not 'Thos'.

Idioms & Expressions

"ठोस नींव रखना"

— To lay a solid foundation for future success or a project.

बचपन की शिक्षा ही जीवन की ठोस नींव रखती है।

General

"ठोस धरातल पर होना"

— To be based on reality or a firm basis.

उसकी योजनाएँ अब ठोस धरातल पर हैं।

Formal

"ठोस जवाब देना"

— To give a definitive or crushing reply.

उसने आलोचकों को अपने काम से ठोस जवाब दिया।

General

"ठोस पहचान बनाना"

— To establish a solid or strong identity/reputation.

उसने बहुत कम समय में अपनी ठोस पहचान बनाई है।

General

"ठोस पकड़ होना"

— To have a solid grasp or command over a subject.

गणित पर उसकी ठोस पकड़ है।

General

"ठोस कदम उठाना"

— To take decisive and effective action.

भ्रष्टाचार के खिलाफ ठोस कदम उठाने होंगे।

Political/Formal

"ठोस आधार प्रदान करना"

— To provide a strong basis for something.

यह रिसर्च हमारे दावों को ठोस आधार प्रदान करती है।

Academic

"ठोस आकार लेना"

— To start taking a definite shape (usually for plans).

अब हमारी योजनाएँ ठोस आकार ले रही हैं।

Business

"ठोस सबूत जुटाना"

— To gather solid evidence.

पुलिस सबूत जुटाने में लगी है ताकि केस ठोस बने।

Legal

"ठोस विश्वास होना"

— To have firm belief or confidence.

मुझे अपनी जीत पर ठोस विश्वास है।

Personal

Easily Confused

ठोस vs कड़ा (Kada)

Both imply hardness.

Kada refers to the hardness of the surface or difficulty to bend. Thos refers to the entire mass being filled and solid.

यह बिस्किट बहुत कड़ा है। (This biscuit is very hard.) vs यह ठोस लकड़ी है। (This is solid wood.)

ठोस vs पक्का (Pukka)

Both can mean 'confirmed'.

Pukka is more colloquial and can mean ripe or cooked. Thos is more formal and specific to substance.

पक्का आम (Ripe mango) - you cannot say 'Thos Aam' here.

ठोस vs दृढ़ (Driddh)

Both mean 'firm'.

Driddh is purely abstract (firm mind/resolve). Thos is both physical and abstract.

दृढ़ संकल्प (Firm resolve) vs ठोस सबूत (Solid proof).

ठोस vs घन (Ghan)

Both mean 'solid' in technical terms.

Ghan is mostly used for 3D volume or density in math/science. Thos is a general-purpose adjective.

घन सेंटीमीटर (Cubic centimeter) vs ठोस कचरा (Solid waste).

ठोस vs अचल (Achal)

Both imply stability.

Achal means 'cannot be moved'. Thos means 'filled with substance'.

अचल पर्वत (Immovable mountain) vs ठोस पत्थर (Solid stone).

Sentence Patterns

[Object] + ठोस + है।

यह मेज ठोस है।

[Subject] + [ठोस + Noun] + खाता/पीता है।

बच्चा ठोस खाना खाता है।

[Person] + के पास + [ठोस + Noun] + है।

मेरे पास ठोस सबूत है।

[Action] + के लिए + [ठोस + Noun] + ज़रूरी है।

सफलता के लिए ठोस योजना ज़रूरी है।

बिना + [ठोस + Noun] + के + [Action] + संभव नहीं।

बिना ठोस आधार के प्रगति संभव नहीं।

[Concept] + की + [ठोस + Noun] + पर + चर्चा।

अस्तित्व की ठोस हकीकत पर चर्चा।

सरकार ने + [ठोस + कदम] + उठाए।

सरकार ने ठोस कदम उठाए।

यह + [Noun] + ठोस + [Material] + का है।

यह हार ठोस सोने का है।

Word Family

Nouns

ठोसपन (Thospan - Solidity/Hardness)

ठोसता (Thosta - Solidity - less common)

Verbs

ठोस बनाना (Thos banana - To make solid/solidify)

ठोस होना (Thos hona - To be/become solid)

Adjectives

ठोस (Thos - Solid)

तरल (Taral - Liquid)

गैस (Gas - Gas)

घन (Ghan - Cube/Dense)

मज़बूत (Mazboot - Strong)

पदार्थ (Padarth - Matter)

How to Use It

frequency

Very frequent in both spoken and written Hindi.

Common Mistakes

Using 'Thos' for physical strength of a person. → Woh bahut 'Mazboot' aadmi hai.
'Thos' implies being made of solid material. Unless you mean the person is like a statue, use 'Mazboot' for human strength.
Using 'Thos' for a solid color. → Saada neela (Plain blue).
In English, we say 'solid blue', but in Hindi, 'Thos' is not used for colors. Use 'Saada' or 'Ek-rangi'.
Using 'Thos' for a difficult task. → Yeh kaam 'Mushkil' hai.
Learners sometimes translate 'hard' as 'Thos'. 'Thos' is hard as in 'solid', not hard as in 'difficult'.
Using 'Thos' for a strict person. → Mera boss 'Sakht' hai.
'Sakht' is the correct word for strictness. 'Thos' describes substance, not behavior.
Thinking 'Thos' changes gender to 'Thosi'. → Thos deewar (Solid wall).
'Thos' is an invariable adjective. It never changes its form.

Tips

No Gender Stress

Remember that 'Thos' is invariable. You don't need to change it to 'Thosi' or 'Those' for feminine or plural nouns. This makes it one of the easiest adjectives to use in Hindi.

Substance over Strength

When choosing between 'Thos' and 'Mazboot', ask yourself: Is it about being filled inside (Thos) or being able to withstand force (Mazboot)? Use 'Thos' for the former.

Legal Weight

In any debate or legal context, use 'Thos saboot' to sound more authoritative. It's the standard term for evidence that cannot be easily dismissed.

States of Matter

Learn 'Thos' alongside 'Taral' (liquid) and 'Gas' (gas). These three words together give you a complete set for describing physical states.

Foundation Matters

Use 'Thos neev' (solid foundation) metaphorically for education, relationships, or business. It's a very common and sophisticated way to speak.

The Retroflex 'Th'

Don't ignore the dot under 'Th' in some transliterations. It means your tongue must curl back. This distinguishes it from the dental 'th' in words like 'Thali'.

Character Praise

Calling someone 'Thos' is a high compliment for their reliability. Use it to describe a mentor or a dependable friend.

Concrete Examples

When writing an essay, instead of just 'Udaharan' (example), use 'Thos udaharan' to signal that you are providing a very clear and undeniable example.

Material Quality

When buying jewelry or furniture, ask if it is 'Thos sona' (solid gold) or 'Thos lakdi' (solid wood) to ensure you aren't getting something hollow or plated.

Hollow vs Solid

Use 'Thos nahi hai' (It is not solid) or 'Khokhla hai' (It is hollow) to describe things that look strong on the outside but are empty inside.

Memorize It

Mnemonic

Think of the word 'TOAST'. A good piece of toast is 'Thos' (solid and firm), not soft and soggy. The sound is similar!

Visual Association

Imagine a solid gold brick. It is 'Thos'—heavy, filled all the way through, and very valuable. This represents both the physical and qualitative meaning.

Word Web

Saboot (Evidence) Aahar (Food) Aadhar (Foundation) Kachra (Waste) Avastha (State) Yojna (Plan) Tark (Argument) Sona (Gold)

Challenge

Try to find three 'Thos' objects in your room and then think of one 'Thos' reason why you are learning Hindi.

Word Origin

The word 'ठोस' (Thos) is likely derived from the Sanskrit root 'स्थिर' (Sthira) meaning firm or steady, or potentially related to the Deshaj (local) developments in Indo-Aryan languages that emphasize physical density.

Original meaning: The original meaning centered around being firm, stable, and unyielding to pressure.

Indo-Aryan

Cultural Context

There are no major sensitivities, but avoid using 'Thos' to describe a person's physical body size, as it can be ambiguous and 'Mazboot' is more polite for 'strong'.

English speakers often use 'concrete' or 'substantial' where Hindi uses 'Thos'. For example, 'concrete steps' becomes 'Thos kadam'.

NCERT Science Textbooks: Use 'Thos' to define the states of matter. Legal News: 'Thos saboot' is the most common phrase in Indian crime reporting. Bollywood: Often used in dialogues to demand a 'solid reason' for betrayal or love.

Practice in Real Life

Real-World Contexts

Science Class

पदार्थ की ठोस अवस्था
ठोस के गुण
ठोस का आयतन
ठोस से तरल में बदलना

Police/Crime News

ठोस सबूतों के आधार पर
कोई ठोस सुराग नहीं
ठोस गवाही
ठोस कार्यवाही

Parenting/Health

ठोस आहार की शुरुआत
ठोस भोजन पचाना
ठोस फल
ठोस पोषण

Business/Strategy

ठोस बिज़नेस प्लान
ठोस निवेश
ठोस रणनीति
ठोस लाभ

Construction

ठोस ढांचा
ठोस लकड़ी
ठोस ईंट
ठोस नींव

Conversation Starters

"क्या आपके पास अपनी बात साबित करने के लिए कोई ठोस सबूत है?"

"इस इमारत की नींव बहुत ठोस लग रही है, क्या यह पुरानी है?"

"डॉक्टर ने बच्चे को कब से ठोस आहार देने के लिए कहा है?"

"क्या आपको लगता है कि सरकार ने प्रदूषण रोकने के लिए ठोस कदम उठाए हैं?"

"सफलता के लिए सिर्फ सपने देखना काफी नहीं, एक ठोस योजना भी चाहिए।"

Journal Prompts

आज आपने अपने लक्ष्यों की ओर कौन सा एक ठोस कदम उठाया? विस्तार से लिखें।

अपने जीवन के उस व्यक्ति के बारे में लिखें जिसका व्यक्तित्व आपको सबसे अधिक 'ठोस' लगता है।

क्या आपको लगता है कि डिजिटल दुनिया में 'ठोस' यादों की कमी होती जा रही है?

एक ऐसी घटना के बारे में लिखें जब आपको किसी ठोस सबूत के बिना किसी पर शक हुआ हो।

अपने सपनों को 'ठोस' रूप देने के लिए आप अगले एक महीने में क्या करेंगे?

Frequently Asked Questions

10 questions

Yes, 'Thos' can describe someone with a reliable, sensible, and unshakeable character. For example, 'Woh thos vichaaron wala vyakti hai' means he is a person with solid/firm thoughts. It is a highly respectful way to describe someone's integrity.

Mostly, yes. When 'concrete' is used as an adjective (like 'concrete evidence' or 'concrete steps'), 'Thos' is the perfect Hindi equivalent. However, for the building material 'concrete', Hindi uses the loanword 'concrete' or 'cement-concrete'.

No, 'Thos' is an invariable adjective. It stays the same regardless of the gender or number of the noun. For example: 'Thos deewar' (solid wall - feminine) and 'Thos pathar' (solid stone - masculine).

It is called 'ठोस अवस्था भौतिकी' (Thos Avastha Bhautiki). This shows how 'Thos' is used as a standard scientific term for the solid state of matter.

The physical opposite is 'Taral' (liquid) or 'Gas' (gas). The metaphorical opposite is 'Khokhla' (hollow) or 'Kamzor' (weak).

No, for a solid or plain color, Hindi speakers usually say 'Saada' (plain) or 'Ek-rangi' (one-colored). 'Thos' is not used for colors.

Yes, in the context of food like yogurt (dahi) or a paste, 'Thos' can imply it is thick and not watery. 'Thos dahi' is thick, well-set yogurt.

It is used in all registers. It's formal in science and law, but very common and neutral in daily conversation about food, materials, and plans.

It is a retroflex 'Th'. Curl your tongue back to touch the roof of your mouth and release it with a strong puff of air. It sounds harder than the English 'th' in 'think'.

It means 'solid food'. It is typically used when discussing the transition of a baby's diet from milk to solid items like fruits, vegetables, or grains.