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Vocabulary
مستدل کردن

B2 verb 8 min read

مستدل کردن

mostadal kardan

Practice it Examples Notes & Tips مستدل کردن in 30 Seconds

Explanation مستدل کردن in your Level:

At the A1 level, the word 'مستدل کردن' is too advanced to use actively. However, you can understand it as a very fancy way of saying 'giving a good reason.' Think of it as 'Reason + Action.' In Persian, 'Dalil' means 'reason.' When you see 'mostadall,' just think: 'This person is trying to be very smart and explain why they think something is true using facts.' At this stage, just focus on the word 'Dalil' (reason) and 'Dalil avardan' (bringing a reason). You might hear this word on the news, and you should know it's about people talking about serious things like laws or science. You don't need to say it yet, but recognizing the 'Dalil' part inside the word will help you connect it to the concept of 'why.' Imagine a child asking 'Why?' and an expert answering with a long, logical explanation—that explanation is 'mostadall.'

For A2 learners, 'مستدل کردن' is a compound verb. You know 'kardan' means 'to do.' The first part, 'mostadall,' comes from 'Dalil' (reason). So, 'mostadall kardan' means 'to make something reasoned.' It is used when you don't just have an opinion, but you have facts to support it. For example, if you say 'I like apples,' that's an opinion. If you say 'Apples are good because they have vitamins,' and you show a book about vitamins, you are starting to 'mostadall kardan' your point. You will see this word in short news articles or formal school books. Try to remember that it is a formal word. If you use it with your friends, they might think you are joking or being very serious. It’s like the difference between saying 'I have a reason' and 'I am providing a logical justification.'

At the B1 level, you should start recognizing 'مستدل کردن' in formal texts, such as editorials or academic introductions. You should understand that it is a transitive verb, meaning it needs an object (the thing you are justifying). For instance, 'He justified his request' (او درخواستش را مستدل کرد). At this level, you can begin to distinguish it from 'tozih dadan' (to explain). While 'tozih dadan' just makes something clear, 'mostadall kardan' makes something 'strong' or 'valid.' You might use it when writing a formal letter to a university or a job application to describe how you backed up your claims. It shows a higher level of Persian proficiency. You should also notice the passive form 'mostadall shodan' (to be justified/reasoned), which is common in reports. Practice using it when you want to sound more persuasive in your writing.

B2 is the target level for this word. You should be able to use 'مستدل کردن' fluently in debates and formal writing. At this stage, you must understand the nuance between this and 'tojihi kardan' (rationalizing/excusing). 'Mostadall kardan' is about the logical architecture of an argument. You should be able to use it to describe the quality of a speech or a text: 'His speech was not well-reasoned' (سخنرانی او مستدل نبود). You should also be comfortable using it in various tenses, such as the present subjunctive: 'باید ادعای خود را مستدل کنید' (You must justify your claim). This word is essential for anyone looking to work in Iran in professional fields like law, journalism, or academia. It reflects an ability to engage with the 'Manteq' (logic) that is so highly valued in Persian discourse. You are now moving beyond just 'giving reasons' to 'constructing arguments.'

At C1, you use 'مستدل کردن' as a tool for precision. You understand its relationship to the Arabic root 'D-L-L' and its place in the history of Islamic and Persian philosophy. You can use it in complex sentences to discuss the validity of philosophical premises or legal rulings. You might also use related forms like 'مدلل' (modallal) or 'استدلال' (estedlal) interchangeably but with a keen sense of their different grammatical functions. At this level, you can critique a text by saying its conclusions are 'ghayre-mostadall' (unreasoned). You also understand the cultural weight of the word—how 'mostadall' speech is a hallmark of the 'Roshanfekr' (intellectual) class in Iran. You can use the verb in the causative or passive with ease, and you might even use it metaphorically in literary analysis to describe how a poet 'justifies' a particular metaphor through the structure of the poem.

For the C2 master, 'مستدل کردن' is part of a vast toolkit of rhetorical verbs. You use it with a deep awareness of its register and its power to frame a discussion. You can distinguish between 'mostadall kardan' (the act of making reasoned) and 'mostanad kardan' (the act of documenting/providing citations), often using them together to describe a perfect academic work ('یک تحقیق مستدل و مستند'). You are capable of using this verb in high-level legal drafting or philosophical treatises. You understand the subtle shift in meaning when the verb is used in different ideological contexts (e.g., how a theologian 'mostadall's' a religious tenet vs. how a scientist 'mostadall's' a theory). Your usage is flawless, and you can even play with the word's formality to create irony or emphasize the extreme lack of logic in an opponent's argument by highlighting their failure to 'mostadall kardan' even the simplest of points.

Practice it Examples Notes & Tips

مستدل کردن in 30 Seconds

A formal verb meaning to justify with logic and evidence.
Commonly used in academic, legal, and professional Persian contexts.
Derived from the root for 'reason' (Dalil) and 'to make' (Kardan).
Distinguished from 'tojihi kardan' which can mean making excuses.

The Persian verb مستدل کردن (mostadall kardan) is a sophisticated compound verb used primarily in formal, academic, and legal contexts. At its core, it means to provide a logical basis for a claim, to justify an opinion with evidence, or to make an argument well-reasoned. Unlike the simple act of 'giving a reason' (دلیل آوردن), which can be informal, mostadall kardan implies a systematic process of building a case. It is the difference between saying 'I don't like this because it's bad' and providing a ten-page report on structural flaws. In Persian intellectual history, the root 'd-l-l' (د-ل-ل) is central to logic (Manteq), and this verb represents the pinnacle of that tradition in modern usage.

Formal Logic: In academic writing, you use this word when a researcher validates their hypothesis through empirical data. It suggests that the conclusion is not merely an opinion but a direct result of evidence.
Legal Context: A judge in an Iranian court must mostadall kardan their verdict. This means they must cite specific laws and precedents to show that the ruling is not arbitrary.
Everyday High-Level Debate: When a critic analyzes a film or a book, they are expected to mostadall kardan their critique so that readers can follow the logic of their praise or disappointment.

The word is composed of 'mostadall' (an Arabic passive participle meaning 'that which is supported by evidence') and the Persian light verb 'kardan' (to do/make). When you use this verb, you are essentially saying you are 'making a claim evidenced.' It is highly respected in Persian culture because it moves a conversation away from emotional reactivity toward intellectual rigor. In a society that values poetry and rhetoric, the ability to mostadall kardan one's views is seen as a sign of maturity and education.

وکیل مدافع توانست با ارائه مدارک جدید، ادعای خود را کاملاً مستدل کند.

Translation: The defense attorney was able to fully justify his claim by presenting new documents.

Furthermore, the nuance of this word involves the 'weight' of the evidence. You wouldn't use it for trivial things like justifying why you chose tea over coffee. It is reserved for matters of truth, law, science, and serious social discourse. When someone asks you to mostadall kardan your point, they are challenging the foundation of your logic. They are asking for the 'Burhan' (proof) that connects your premise to your conclusion. Historically, this term gained prominence during the translation movements where Greek logic was integrated into Persian and Arabic thought, making it a bridge between classical philosophy and modern legalistic Persian.

Using مستدل کردن correctly requires understanding its grammatical role as a compound verb. It functions like other 'kardan' verbs but carries a heavy semantic load. Below are the primary ways to integrate it into your Persian speech and writing.

As a Transitive Verb: The most common usage is [Subject] + [Object] + [mostadall kardan]. For example: 'The scientist justified his theory.' (دانشمند نظریه‌اش را مستدل کرد).
In the Passive Voice: In formal reports, you might say a claim 'was justified.' You would use 'mostadall shodan' (مستدل شدن). For example: 'The claim was justified with historical documents' (ادعا با اسناد تاریخی مستدل شد).

نویسنده در این کتاب سعی کرده است دیدگاه‌های فلسفی خود را به شکلی مستدل بیان کند.

Note that in the example above, 'mostadall' is used as an adjective modifying the manner of expression. This is a common variation where the verb is implied or the adjective describes the 'how' of an action. When you want to emphasize the process of reasoning, you might use the noun form 'estedlal' (استدلال), but when you want to emphasize the result (making the argument solid), you use 'mostadall kardan'.

برای پذیرش این طرح در مجلس، باید آن را از نظر اقتصادی مستدل کرد.

When constructing complex sentences, you often pair mostadall kardan with prepositions like 'ba' (with) to indicate the evidence used. For example, 'mostadall kardan ba amār' (justifying with statistics). It can also be followed by a 'ke' clause if you are justifying the fact that something is true. However, usually, it is the 'opinion' (nazar), 'claim' (edde'ā), or 'verdict' (hokm) that acts as the direct object. Mastering this verb allows you to participate in 'Goftegoo' (dialogue) at a level that commands respect in Iranian intellectual circles.

You will not likely hear مستدل کردن at a grocery store or while chatting about the weather. This is a 'prestige' verb. Its natural habitats are environments where truth and evidence are the primary currency. Understanding these contexts helps you recognize the 'vibe' of the word.

News and Political Analysis: On channels like BBC Persian or Iran International, analysts often say, 'The government has not yet been able to mostadall kardan its new economic policy.' They are criticizing the lack of logical transparency.
The Courtroom: In the Iranian judiciary system, every 'Hokm' (verdict) must be 'Mostadall' and 'Mostanad' (documented). You will hear lawyers arguing that the opposing side's claims are not mostadall.
University Seminars: During a thesis defense (defā-ye pāyān-nāme), a professor might tell a student: 'You have a good idea, but you haven't mostadall-ed it enough in Chapter 3.'

گزارشگر تلویزیون پرسید: چگونه می‌توانید این اتهامات را مستدل کنید؟

In literature and philosophy podcasts, which are very popular in Iran today (like 'Radio Marz' or academic lectures on SoundCloud), this verb appears frequently when discussing the 'Logos' or the rational structure of a text. Iranians value the 'Borhan' (demonstrative proof), and thus mostadall kardan is seen as the act of a 'Hakim' (a wise person or philosopher). If you use this word, you are signaling that you are engaging in 'Manteq' (logic) rather than 'Saffsateh' (sophistry/fallacy).

در مقالات علمی، هر ادعایی باید با ارجاع به منابع معتبر مستدل شود.

Because مستدل کردن is a high-level word, learners often confuse it with similar-sounding or similar-meaning verbs. Avoiding these pitfalls will make your Persian sound much more natural.

Confusing with 'Tojihi Kardan': This is the most common mistake. 'Tojihi kardan' (توجیه کردن) often means 'to make an excuse' or 'to rationalize' something that might be wrong. Mostadall kardan is neutral and positive—it's about logic. If you say you are 'mostadall kardan' your lateness, it sounds weird; you should use 'tojihi'.
Overusing it in Casual Speech: Using this verb while deciding what to eat for dinner makes you sound like a robot or someone trying too hard. Stick to 'dalil avardan' (bringing a reason) for daily life.
Mixing up 'Estedlal' and 'Mostadall': Remember: 'Estedlal kardan' is the action of reasoning (the process). 'Mostadall kardan' is the action of making a specific thing well-reasoned (the result applied to an object).

اشتباه: من دیر رسیدنم را مستدل کردم.
درست: من دیر رسیدنم را توجیه کردم.

Another mistake is the pronunciation. The 'o' in 'mostadall' is short, and the 'l' at the end is doubled (tashdid). Skipping the tashdid makes it sound like 'mostadal', which is incorrect. Also, learners sometimes forget that mostadall is an adjective that can stand alone. You can say 'An nazar mostadall ast' (That opinion is well-reasoned) without the 'kardan'.

To truly master مستدل کردن, you must see how it fits into the family of Persian 'reasoning' words. Each has a slightly different shade of meaning.

استدلال کردن (Estedlal Kardan): Meaning: To reason. Focuses on the mental process of logic. You 'estedlal' to reach a conclusion. You 'mostadall' the conclusion itself.
توجیه کردن (Tojihi Kardan): Meaning: To justify or rationalize. Often used for behavior or mistakes. It can have a negative connotation of making excuses, whereas 'mostadall' is always purely logical.
اثبات کردن (Esbat Kardan): Meaning: To prove. This is stronger than 'mostadall'. If you 'esbat' something, it is now an undeniable fact. If you 'mostadall' something, you have provided a strong, logical argument for it, but it might still be debated.
مدلل ساختن (Modallal Sakhtan): Meaning: To make evidenced. This is a very literary synonym for 'mostadall kardan'. It is used in classical or extremely formal modern literature.

تفاوت: 'اثبات' برای ریاضیات است، 'مستدل کردن' برای فلسفه و حقوق.

Distinction: 'Esbat' is for mathematics; 'Mostadall kardan' is for philosophy and law.

When choosing between these, consider your goal. If you want to show you have 'receipts' and logical steps, use mostadall kardan. If you want to say you've reached the final truth, use esbat kardan. If you are explaining why you were late to a meeting, use tojihi kardan. If you are just 'thinking out loud' logically, use estedlal kardan.

How Formal Is It?

Fun Fact

The same root gives us 'Dallal' (a broker), because a broker 'points out' the value of goods to a buyer.

Pronunciation Guide

UK /mos.tæ.dæl kær.dæn/

US /mos.tæ.dɛl kɑːr.dɛn/

Primary stress is on the last syllable of 'mostadall' and the last syllable of 'kardan'.

Rhymes With

مکمل (mokammel) مفصل (mofassal) مبدل (mobaddal) معطل (mo'attal) مبتذل (mobtazal) منحل (monhall) مختل (mokhtall) مجلل (mojallal)

Common Errors

Pronouncing as 'mostadal' without the double 'l' sound.
Pronouncing the first vowel as 'u' like 'moostadall'.
Stress on the first syllable.
Merging 'mostadall' into one word with 'kardan' without a slight break.
Confusing the 'a' in 'dal' with 'o'.

Difficulty Rating

Reading 4/5

Requires knowledge of Arabic loanwords and formal structure.

Writing 5/5

Difficult to use correctly without sounding overly stiff.

Speaking 4/5

Used only in specific formal or intellectual contexts.

Listening 3/5

Clear pronunciation, but context is key to understanding.

What to Learn Next

Prerequisites

دلیل (Dalil) کردن (Kardan) ثابت کردن (Esbat kardan) چرا (Chera) منطق (Manteq)

Learn Next

تبیین (Tabyin) استنتاج (Estentaj) برهان (Borhan) فرضیه (Farziyeh) تحلیل (Tahlil)

Advanced

قیاس (Ghiyas) استقرا (Esteghra) دیالکتیک (Dialectic) هرمنوتیک (Hermeneutic)

Grammar to Know

Compound Verbs with 'Kardan'

مستدل + کردن = مستدل کردن

Passive Construction with 'Shodan'

ادعا مستدل شد.

Adverbial formation with 'Be tor-e'

به طور مستدل

Subjunctive after 'Bayad'

باید آن را مستدل کنیم.

Noun formation with '-sazi'

مستدل‌سازی

Examples by Level

او دلیل خوبی دارد.

He has a good reason.

A1 level uses 'dalil' (reason) instead of the complex verb.

چرا این کار را کردی؟ دلیل بیاور.

Why did you do this? Give a reason.

Simple imperative 'dalil biavar'.

این حرف منطقی است.

This word/statement is logical.

Using 'manteqi' (logical) as a simpler alternative.

من برای عشقم دلیل ندارم.

I don't have a reason for my love.

Negative 'dalil nadaram'.

او با دلیل حرف می‌زند.

He speaks with reason.

Preposition 'ba' + 'dalil'.

دلیل تو چیست؟

What is your reason?

Simple question structure.

این یک دلیل ساده است.

This is a simple reason.

Adjective 'sadeh' (simple) modifying 'dalil'.

او می‌خواهد دلیلش را بگوید.

He wants to say his reason.

Present subjunctive 'beguyad'.

او سعی کرد حرفش را با دلیل ثابت کند.

He tried to prove his word with a reason.

Using 'esbat kardan' (to prove) as a precursor to 'mostadall kardan'.

ما باید برای این کار دلیل بیاوریم.

We must bring a reason for this work.

Modal 'bayad' + 'dalil avardan'.

حرف‌های او مستدل به نظر می‌رسد.

His words seem well-reasoned.

Using 'mostadall' as an adjective with 'be nazar residan'.

آیا می‌توانی نظرت را مستدل کنی؟

Can you justify your opinion?

Simple present question with the target verb.

او با اسناد، ادعایش را مستدل کرد.

He justified his claim with documents.

Past tense of the compound verb.

این یک گزارش مستدل است.

This is a well-reasoned report.

Adjectival use of 'mostadall'.

لطفاً حرف خود را مستدل کنید.

Please justify your statement.

Formal imperative.

او نتوانست حرفش را مستدل کند.

He couldn't justify his statement.

Negative potential 'natavanest'.

نویسنده تلاش می‌کند فرضیه خود را مستدل کند.

The author tries to justify his hypothesis.

Transitive usage in an academic context.

برای متقاعد کردن مدیر، باید طرح را مستدل کرد.

To convince the manager, the plan must be justified.

Impersonal 'bayad ... kard' construction.

گزارش نهایی کاملاً مستدل و دقیق بود.

The final report was completely well-reasoned and precise.

Adjective pair 'mostadall va daghigh'.

او با استفاده از آمار، مخالفتش را مستدل کرد.

Using statistics, he justified his opposition.

Gerund-like 'ba estefadeh az' phrase.

این ادعا به اندازه کافی مستدل نشده است.

This claim has not been sufficiently justified.

Present perfect passive 'mostadall nashodeh ast'.

قاضی از وکیل خواست تا دفاعیه را مستدل کند.

The judge asked the lawyer to justify the defense.

Subjunctive 'mostadall konad' after 'khast'.

بدون مستدل کردن نظرات، کسی آن‌ها را نمی‌پذیرد.

Without justifying opinions, no one will accept them.

Gerund use of the infinitive 'mostadall kardan'.

او همیشه حرف‌هایش را مستدل بیان می‌کند.

He always expresses his words in a well-reasoned manner.

Adverbial usage of 'mostadall'.

پژوهشگر باید نتایج آزمایش را به طور علمی مستدل کند.

The researcher must scientifically justify the test results.

Adverb 'be tor-e elmi' (scientifically).

اگر نتوانی ادعایت را مستدل کنی، شکست خواهی خورد.

If you cannot justify your claim, you will fail.

Conditional 'agar' + subjunctive.

این کتاب به خوبی توانسته است لزوم تغییرات را مستدل کند.

This book has successfully justified the necessity of changes.

Compound verb with 'tavanestan'.

منتقدان معتقدند که این تئوری هنوز مستدل نشده است.

Critics believe that this theory has not yet been justified.

Passive present perfect.

او با ارائه برهان‌های منطقی، دیدگاه خود را مستدل کرد.

By providing logical proofs, he justified his viewpoint.

Use of 'borhan' (proof) with the verb.

یک مقاله علمی باید کاملاً مستدل و مستند باشد.

A scientific paper must be fully reasoned and documented.

Adjective phrase 'mostadall va mostanad'.

او سعی کرد تصمیم جنجالی خود را مستدل کند.

He tried to justify his controversial decision.

Adjective 'janjali' (controversial).

آیا این حکم بر اساس شواهد مستدل شده است؟

Is this verdict justified based on evidence?

Passive question.

نویسنده در مقدمه، چارچوب نظری خود را به دقت مستدل کرده است.

In the introduction, the author has carefully justified his theoretical framework.

Present perfect tense with 'be deghat' (carefully).

عدم توانایی در مستدل کردن فرضیات، اعتبار تحقیق را زیر سؤال می‌برد.

Inability to justify hypotheses calls the research's validity into question.

Noun phrase 'adam-e tavanayi' (inability).

او با ظرافت خاصی، پارادوکس‌های موجود را مستدل کرد.

With a specific nuance, he justified the existing paradoxes.

Use of 'zarafat' (nuance/delicacy).

باید بین توجیه کردن و مستدل کردن تفاوت قائل شد.

One must distinguish between rationalizing and justifying logically.

Infinitive as a subject.

نظریات وی چنان مستدل بودند که جای هیچ شکی باقی نگذاشتند.

His theories were so well-reasoned that they left no room for doubt.

Result clause 'chenan ... ke'.

فیلسوف می‌کوشد وجود جهان را به روشی عقلی مستدل کند.

The philosopher strives to justify the existence of the world in a rational way.

Formal verb 'mikushad' (strives).

این بیانیه سیاسی به هیچ وجه مستدل به نظر نمی‌رسد.

This political statement does not seem well-reasoned at all.

Negative 'be hich vajh'.

او با تکیه بر سنت‌های ادبی، نوآوری خود را مستدل کرد.

Relying on literary traditions, he justified his innovation.

Participle 'takieh bar' (relying on).

بررسی‌های اپیستمولوژیک نشان می‌دهد که چگونه می‌توان گزاره‌ها را مستدل کرد.

Epistemological studies show how propositions can be justified.

Highly academic 'gozareh-ha' (propositions).

او در رساله خود، مبانی اخلاقی را به شکلی استوار مستدل کرده است.

In his treatise, he has robustly justified ethical foundations.

Adverbial 'be shekli ostovar' (robustly).

گفتمان غالب سعی دارد نابرابری‌ها را به شکلی کاذب مستدل کند.

The dominant discourse tries to falsely justify inequalities.

Sociological term 'gofteman-e ghaleb' (dominant discourse).

وی با به چالش کشیدن پیش‌فرض‌ها، ضرورت اصلاحات را مستدل کرد.

By challenging assumptions, he justified the necessity of reforms.

Gerund 'be chalesh keshidan' (challenging).

این اثر ادبی توانسته است رنج انسانی را به شکلی متافیزیکی مستدل کند.

This literary work has managed to justify human suffering metaphysically.

Adverb 'metafiziki'.

مستدل کردن یک ادعای کلامی نیازمند تسلط بر فنون مناظره است.

Justifying a theological claim requires mastery of debate techniques.

Infinitive as a subject with 'niazmand' (requiring).

هرگونه تلاش برای مستدل کردن خشونت محکوم به شکست است.

Any attempt to justify violence is doomed to failure.

Strong phrase 'mahkum be shekast' (doomed to failure).

او با استادی تمام، پیچیده‌ترین مفاهیم را مستدل و ساده‌سازی کرد.

With total mastery, he justified and simplified the most complex concepts.

Superlative 'pichideh-tarin'.

Common Collocations

ادعای مستدل

به طور مستدل

کاملاً مستدل

مستدل و مستند

حکم مستدل

پاسخ مستدل

مستدل کردن فرضیه

مستدل کردن مخالفت

دفاعیه مستدل

نقد مستدل

Common Phrases

حرف مستدل زدن

— To speak with logic and evidence.

او همیشه حرف مستدل می‌زند.

مستدل به اسناد

— Justified by documents.

این ادعا مستدل به اسناد تاریخی است.

غیر مستدل

— Unreasoned or baseless.

نظرات او غیر مستدل هستند.

مستدل ساختن دیدگاه

— To make one's viewpoint reasoned.

او دیدگاهش را مستدل ساخت.

پایان‌نامه مستدل

— A well-reasoned thesis.

او یک پایان‌نامه مستدل ارائه داد.

مستدل کردن با آمار

— Justifying using statistics.

او حرفش را با آمار مستدل کرد.

مستدل کردن تصمیم

— To justify a decision.

مدیر تصمیم خود را مستدل کرد.

اعتراض مستدل

— A reasoned protest/objection.

آن‌ها یک اعتراض مستدل نوشتند.

مستدل کردن باورها

— To justify one's beliefs.

او باورهایش را مستدل کرد.

به صورت مستدل بیان کردن

— To express in a reasoned manner.

او نظراتش را به صورت مستدل بیان کرد.

Often Confused With

مستدل کردن vs توجیه کردن

Tojihi often implies making excuses, while Mostadall is about logical proof.

مستدل کردن vs استدلال کردن

Estedlal is the process of reasoning; Mostadall is making a specific claim reasoned.

مستدل کردن vs مستند کردن

Mostanad is specifically about providing documents/citations, not just logic.

Idioms & Expressions

"حرفش خریدار دارد"

— His word is accepted (often because it is mostadall).

چون مستدل حرف می‌زند، حرفش خریدار دارد.

Colloquial

"با منطق جلو آمدن"

— To approach a situation with logic.

او با منطق جلو آمد و حرفش را مستدل کرد.

Neutral

"روی هوا حرف زدن"

— To speak without basis (the opposite of mostadall kardan).

او روی هوا حرف می‌زند و هیچ چیز را مستدل نمی‌کند.

Informal

"دلیل و مدرک آوردن"

— To bring reasons and evidence.

او برای هر ادعایی دلیل و مدرک می‌آورد.

Neutral

"مشت گره کرده (metaphorical)"

— Using force instead of logic (opposite of mostadall).

او به جای مستدل کردن، با مشت گره کرده جواب داد.

Literary

"سنگ روی سنگ بند کردن"

— To make things solid/stable (can refer to a solid argument).

او با مستدل کردن حرفش، سنگ روی سنگ بند کرد.

Colloquial

"کلاه خود را قاضی کردن"

— To judge for oneself logically.

کلاهت را قاضی کن و ببین حرفم مستدل است یا نه.

Idiomatic

"آب پاکی روی دست کسی ریختن"

— To give a final, definitive (often reasoned) answer.

او با یک جواب مستدل، آب پاکی روی دست من ریخت.

Idiomatic

"بی‌گدار به آب نزدن"

— Not to act without careful reasoning.

او بی‌گدار به آب نمی‌زند و اول همه چیز را مستدل می‌کند.

Idiomatic

"حرف حساب زدن"

— To speak sense/truth (often implies a reasoned argument).

حرف حساب می‌زند؛ کاملاً مستدل است.

Colloquial

Easily Confused

مستدل کردن vs مدلل

Sounds similar and has the same root.

Modallal is usually an adjective or part of a more literary verb 'sakhtan'.

متن مدلل بود.

مستدل کردن vs مستدل

Is it an adjective or a verb?

It is the adjective part of the compound verb 'mostadall kardan'.

حرف مستدل.

مستدل کردن vs دلیل

The root word.

Dalil is the noun (reason); Mostadall is the state of being reasoned.

او دلیل آورد.

مستدل کردن vs توضیح

General explanation.

Tozih is just making it clear; Mostadall is making it logically valid.

او توضیح داد.

مستدل کردن vs اثبات

Both involve proving.

Esbat is the final proof (100%); Mostadall is the logical argument.

او قضیه را اثبات کرد.

Sentence Patterns

من باید [Object] را مستدل کنم.

من باید درخواستم را مستدل کنم.

[Subject] سعی کرد با [Evidence] حرفش را مستدل کند.

او سعی کرد با نقشه حرفش را مستدل کند.

[Concept] بدون مستدل کردن، فاقد اعتبار است.

نظریه بدون مستدل کردن، فاقد اعتبار است.

ساختار مستدل [Noun] نشان‌دهنده [Meaning] است.

ساختار مستدل کتاب نشان‌دهنده دقت نویسنده است.

آیا می‌توانید [Object] را مستدل کنید؟

آیا می‌توانید این اتهام را مستدل کنید؟

این یک [Noun] مستدل است.

این یک نقد مستدل است.

به جای توجیه کردن، باید [Object] را مستدل کرد.

به جای توجیه کردن، باید اشتباهات را مستدل کرد.

ادعای او به خوبی مستدل شده است.

Word Family

Nouns

استدلال (Estedlal) - Reasoning

دلیل (Dalil) - Reason

مدلول (Madlul) - Signified/Meaning

دال (Dall) - Signifier

ادله (Adelleh) - Reasons/Evidences (plural)

Verbs

استدلال کردن (Estedlal kardan) - To reason

دلالت کردن (Dalalat kardan) - To signify/indicate

مدلل ساختن (Modallal sakhtan) - To make evidenced

Adjectives

مستدل (Mostadall) - Well-reasoned

مدلل (Modallal) - Evidenced

دلالی (Dalali) - Intermediary/Brokerage

بی‌دلیل (Bi-dalil) - Groundless

منطق (Manteq) - Logic

برهان (Borhan) - Proof

توجیه (Tojih) - Justification

حجت (Hojjat) - Proof/Authority

سفسطه (Saffsateh) - Sophistry

How to Use It

frequency

Common in formal writing and news; rare in daily conversation.

Common Mistakes

Using 'mostadall kardan' for excuses. → توجیه کردن (Tojihi kardan)
Mostadall is for logical evidence; Tojihi is for personal justifications or excuses.
Pronouncing it 'mostadal'. → مستدل (Mostadall)
The double 'l' (tashdid) is important for correct formal pronunciation.
Using it without an object. → او حرفش را مستدل کرد.
It is a transitive verb; you must justify *something*.
Confusing with 'estedlal kardan'. → او استدلال کرد (He reasoned).
Estedlal is the process; Mostadall is making the object reasoned.
Using it for trivial choices. → دلیل آوردم (I gave a reason).
Mostadall kardan is too heavy for choosing a pizza topping.

Tips

Pair with Evidence

Whenever you use 'mostadall kardan', try to mention *what* you are using to justify it, like 'ba sanad' (with document) or 'ba manteq' (with logic).

Keep it Professional

Save this word for essays, business meetings, or serious debates. Using it at a party might make you sound like you're still in a classroom.

Passive Voice

The passive 'mostadall shodan' is very useful in reporting. 'Natijeh mostadall shod' (The result was justified) sounds very objective.

Learn the Family

Learning 'Dalil', 'Estedlal', and 'Mostadall' together will help you see the logical 'web' of the Persian language.

Avoid Tojihi

Remember that 'mostadall' is about truth, while 'tojihi' is often about saving face. Don't mix them up in a court or a university.

The Double L

Pronounce the 'll' at the end of 'mostadall' with a tiny bit of extra force. It shows you know the Arabic root properly.

Legal Reading

If you read Iranian legal news, look for this word. It's the key to understanding how judges explain their decisions.

Thesis Statements

Use this verb in your thesis statement to show that your work is not just an opinion but a reasoned argument.

News Keywords

In Persian news, 'mostadall' is a keyword that indicates the speaker is about to give evidence or a logical breakdown.

The Reason-Maker

Think of the verb as the 'Reason-Maker'. You are taking a raw idea and making it 'reasoned'.

Memorize It

Mnemonic

Think of 'Mostadall' as 'Most-at-all'. If you have the 'most' evidence 'at all', your point is 'mostadall'.

Visual Association

Imagine a table with many strong legs. Each leg is a 'Dalil' (reason). The table itself is 'mostadall' because it is firmly supported and won't fall.

Word Web

Logic Law Reason Evidence Proof Argument Fact Foundation

Challenge

Write three sentences justifying why you are learning Persian, using 'mostadall kardan' in at least one of them.

Word Origin

Derived from the Arabic root د-ل-ل (D-L-L), which carries the meaning of 'to guide,' 'to point out,' or 'to demonstrate.' The form 'mostadall' is the passive participle of the X form (istaf'ala), which usually implies seeking or achieving a state.

Original meaning: Originally, it meant something that has been pointed to or guided by evidence.

Semitic root (Arabic) integrated into Indo-European (Persian) grammar.

Cultural Context

It is a neutral, intellectual term. No specific sensitivities, but using it incorrectly (e.g., for excuses) can make you sound pretentious.

Equivalent to 'to provide a logical justification' or 'to substantiate'.

Used frequently in the 'Nahj al-Balagha' translations for logical sermons. A key term in the works of Mohammad-Ali Foroughi, who modernised Persian philosophical language. Common in legal codes of the Islamic Republic of Iran regarding judicial verdicts.

Practice in Real Life

Real-World Contexts

Academic Writing

مستدل کردن فرضیه
چارچوب مستدل
به صورت مستدل
ارائه شواهد مستدل

Legal Proceedings

حکم مستدل
مستدل و مستند
دفاعیه مستدل
مستدل کردن اتهام

Political Debate

سیاست‌های مستدل
مستدل کردن برنامه‌ها
انتقاد مستدل
بیانیه غیرمستدل

Journalism

گزارش مستدل
تحلیل مستدل
مستدل کردن ادعاها
خبر مستدل

Philosophy

مستدل کردن وجود
نظام مستدل
رویکرد مستدل
مستدل کردن اخلاق

Conversation Starters

"چگونه می‌توانید این ادعا را مستدل کنید؟"

"آیا فکر می‌کنید این کتاب به خوبی دیدگاهش را مستدل کرده است؟"

"برای مستدل کردن نظرتان به چه مدارکی نیاز دارید؟"

"چرا مستدل کردن حرف‌ها در سیاست اهمیت دارد؟"

"آیا یک نقد ادبی حتماً باید مستدل باشد؟"

Journal Prompts

یک موضوع جنجالی را انتخاب کنید و سعی کنید آن را به صورت مستدل بنویسید.

چرا برخی افراد نمی‌توانند نظرات خود را مستدل کنند و به جای آن عصبانی می‌شوند؟

تفاوت بین 'توجیه کردن' و 'مستدل کردن' را در زندگی شخصی خود بررسی کنید.

چگونه می‌توانیم در گفتگوهای روزمره حرف‌هایمان را مستدل‌تر کنیم؟

یک خاطره بنویسید که در آن مجبور شدید تصمیم سختی را برای دیگران مستدل کنید.

Frequently Asked Questions

10 questions

Technically yes, but it sounds very strange. If you 'mostadall kardan' why you bought a specific brand of milk, people will think you are being overly dramatic or robotic. Use 'dalil avardan' for small things.

The word 'mostadall' is Arabic, but 'mostadall kardan' is a Persian compound verb. This is very common in Persian, where Arabic adjectives are combined with Persian verbs.

The most common opposite is 'ghayre-mostadall' (unreasoned) or 'bi-payeh' (baseless). In a logical context, you might also say 'bi-dalil'.

You can simply use the adjective 'mostadall'. For example, 'Yek harfe mostadall' means 'a well-reasoned statement'.

Rarely in classical poetry, which prefers simpler or more purely Persian words. However, it is common in modern philosophical poetry or didactic literature.

No, you don't say 'a mostadall person'. You say 'a person who speaks mostadall' (shakhsi ke mostadall harf mizanad).

'Manteqi' means logical in a general sense. 'Mostadall' specifically means that the logic has been applied and presented with evidence.

In formal Tehrani speech, yes. In very casual street slang, it is almost never heard unless someone is mocking an intellectual.

Yes! It's a great word to use in a job interview to show you are a logical and professional person. E.g., 'I can justify my decisions' (Man mitavanam tasmimatham ra mostadall konam).

As a verb, no. As an adjective, in very formal Arabic-style Persian, you might see 'mostadallat', but it is extremely rare. Stick to 'mostadall'.