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B2 adjective 10 Min. Lesezeit

perusteluton

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Erklärung perusteluton in your Level:

At the A1 level, 'perusteluton' is too difficult. You won't see it in beginner textbooks. Instead, you would use simple words like 'ei' (no) or 'huono' (bad). If you want to say something has no reason, you might say 'ei syytä' (no reason). For example: 'Minulla ei ole syytä pelätä' (I have no reason to fear). This word is made of smaller parts: 'peruste' (reason) and '-ton' (without). Even if you don't use it yet, knowing that '-ton' means 'without' is a great A1 goal! Think of 'sokeriton' (sugar-free). 'Perusteluton' is just 'reason-free' in a very formal way.

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At A2, you are starting to learn how to describe things more specifically. You might encounter 'perusteluton' in simple news headlines or formal letters. You should focus on the suffix '-ton'. If you know 'peruste' means 'reason', you can guess that 'perusteluton' means something like 'without reasons'. You might use it to say 'Väite on perusteluton' (The claim is unfounded) if you are practicing for a simple debate. However, you will mostly use easier synonyms like 'turha' (useless/unnecessary) or 'väärä' (wrong). It is good to recognize this word, but don't worry if you can't decline it into all the cases yet.

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At B1, you are moving into intermediate Finnish. You should be able to understand 'perusteluton' when reading a newspaper or listening to a formal speech. You can start using it in your writing to sound more professional. Instead of saying 'Se on tyhmä idea' (It's a stupid idea), you can say 'Se on perusteluton idea' (It's an unfounded idea). This makes your Finnish sound more mature. Pay attention to the consonant gradation: the 't' becomes 'tt' when you add endings. For example: 'perusteluttomia väitteitä' (unfounded claims). This is the level where you start to distinguish between 'aiheeton' (groundless) and 'perusteluton' (unjustified).

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B2 is the target level for this word. You should use 'perusteluton' confidently in professional and academic contexts. You understand that it implies a lack of logical argumentation. You can use it to critique theories, legal decisions, or social trends. You are comfortable with its declension (perusteluton -> perusteluttoman) and you know it often takes the partitive case in 'On perustelutonta...' structures. You can use it to express nuance, such as the difference between a claim being factually false and simply lacking evidence. This word is a key part of your 'argumentation toolkit' at this level.

At C1, you use 'perusteluton' with complete ease and can distinguish it from very similar terms like 'perusteeton' or 'mielivaltainen'. You recognize its use in legal jargon and can follow complex debates about 'perusteluton etu' (unjustified enrichment) in law. You can use the word metaphorically in creative writing to describe abstract feelings or philosophical states. You also notice when it is used as a rhetorical device in political speeches to dismiss an opponent's view without providing a counter-argument. Your mastery of the word includes knowing exactly which case to use in complex sentence structures.

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At C2, you have a native-like grasp of 'perusteluton'. You can use it in highly technical legal or philosophical texts. You understand the historical development of the word and its relationship to other 'perust-' root words. You can play with the word in wordplay or advanced irony. You might use it to critique the very nature of logic itself. You are also aware of how the word's frequency has changed in Finnish media over the decades. For you, 'perusteluton' is not just a vocabulary item, but a precise surgical instrument for dissecting arguments and social phenomena.

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perusteluton in 30 Sekunden

Perusteluton means unfounded or baseless in Finnish.
It comes from 'perustelu' (justification) and '-ton' (without).
Commonly used in legal, academic, and professional Finnish.
Declines with 'tt' doubling: perusteluton -> perusteluttoman.

The Finnish word perusteluton is a sophisticated adjective that translates most accurately to 'unfounded,' 'baseless,' or 'unjustified.' To understand its DNA, one must look at the root noun perustelu, which means 'argument,' 'justification,' or 'reasoning.' In Finnish grammar, the suffix -ton/-tön is the abessive suffix, signifying the absence of something—essentially the English equivalent of '-less' or 'without.' Therefore, perusteluton literally describes something that is 'without justification.'

Legal and Formal Context: In Finnish law and official bureaucracy, this term is used to describe claims, dismissals, or demands that lack a legal or factual basis. If a contract is terminated without a valid reason, the termination is described as perusteluton irtisanominen.
Academic and Intellectual Debate: When a researcher makes a claim without providing evidence or logical steps, peers will label the conclusion as perusteluton väite. It suggests a lack of intellectual rigor.
Emotional and Interpersonal Use: In daily life, it often appears when someone feels they are being accused of something unfairly. 'Syytöksesi ovat täysin perusteluttomia' (Your accusations are completely unfounded) is a common way to defend one's character.

Oikeus totesi, että kanteesi on täysin perusteluton ja hylkäsi sen välittömästi.
— The court stated that your claim is completely unfounded and dismissed it immediately.

The word carries a weight of objectivity. Unlike 'valheellinen' (false), which implies a deliberate lie, perusteluton focuses on the structural failure of the logic itself. You might believe what you are saying is true, but if you cannot show the 'perusteet' (grounds), your statement remains perusteluton. This makes it a powerful tool in professional feedback and critical thinking. It allows you to criticize an idea without necessarily attacking the person's honesty.

Pelko on usein perusteluton, mutta se tuntuu silti todelliselta.
— Fear is often unfounded, but it feels real nonetheless.

In a societal context, Finns value 'asiaosaaminen' (substantive expertise). Making perusteluttomia statements can quickly damage one's credibility in a Finnish workplace. It is always better to say 'I don't know yet' than to offer a perusteluton opinion. This reflects the Finnish cultural emphasis on honesty, precision, and the avoidance of 'small talk' that lacks substance.

Hänen pessimismissään oli jotain perustelutonta.
— There was something groundless about his pessimism.

Grammatical Behavior: As an adjective ending in -ton, it undergoes a consonant gradation change when declined. The 't' doubles to 'tt' in most cases (e.g., perusteluttoman, perusteluttomia). This is a crucial hurdle for B2 learners to master.

Älä tee perusteluttomia johtopäätöksiä liian aikaisin.
— Do not make unfounded conclusions too early.

On perustelutonta olettaa, että kaikki suomalaiset rakastavat saunomista.
— It is unfounded to assume that all Finns love going to the sauna.

Using perusteluton correctly requires an understanding of how Finnish adjectives agree with the nouns they modify. Since it often appears in formal contexts, you will frequently see it in the nominative, partitive, and genitive cases. Let's explore the syntactic patterns that make this word work in various communicative scenarios.

The Predicative Use: When you say 'Something IS unfounded,' the word often takes the partitive case if the subject is abstract or an infinitive phrase. For example: On perustelutonta väittää... (It is unfounded to claim...). If the subject is a concrete noun, use the nominative: Väite on perusteluton.
Attributive Use with Declension: When modifying a noun directly, it must match the case. 'I don't like unfounded claims' becomes En pidä perusteluttomista väitteistä (elative case). Note the 'tt' doubling.

Työnantaja antoi työntekijälle perusteluttoman varoituksen.
— The employer gave the employee an unjustified warning.

In professional writing, you often use perusteluton to negate a previous point. It serves as a polite but firm 'no' in a debate. Instead of saying 'You are wrong,' saying 'The statement is unfounded' (Väite on perusteluton) shifts the focus to the logic rather than the person. This is highly valued in Finnish 'asialinja' (matter-of-fact) communication style.

On täysin perustelutonta syyttää meitä tästä virheestä.
— It is completely unfounded to blame us for this mistake.

Let's look at the negative construction. If you want to say something is NOT unfounded, you would use ei ole perusteluton or simply perusteltu (justified). In many cases, using the positive perusteltu is more natural, but ei ole perusteluton is used for emphasis or when responding to an accusation of being baseless.

Valituksesi ei ole täysin perusteluton, mutta tarvitsemme lisää todisteita.
— Your complaint is not entirely unfounded, but we need more evidence.

Common Noun Pairings

Perusteluton pelko (Unfounded fear)
Perusteluton optimismi (Baseless optimism)
Perusteluton viive (Unjustified delay)
Perusteluton etu (Unjustified advantage)

Hinnankorotus vaikuttaa meistä perusteluttomalta.
— The price increase seems unjustified to us. (Ablative case expressing opinion).

In more poetic or literary Finnish, perusteluton can describe an existential state—a feeling of being without a 'why.' For example, a character might feel a 'perusteluton suru' (a sadness without a reason). This highlights the versatility of the word from the courtroom to the soul.

Tunsin perustelutonta iloa sinä aamuna.
— I felt unfounded (spontaneous/reasonless) joy that morning.

While perusteluton is a B2-level word, it is remarkably common in specific domains of Finnish life. You might not hear it shouted in a crowded bar, but you will certainly encounter it in any environment where accountability and logic are paramount.

The News and Media: Finnish news outlets like Yle or Helsingin Sanomat use this word daily. Journalists use it to critique political decisions or to report on legal verdicts. 'Opposition mukaan hallituksen leikkaukset ovat perusteluttomia' (According to the opposition, the government's cuts are unfounded).
Workplace and HR: This is a key word in Finnish labor law (työoikeus). If you are discussing employee rights or performance reviews, 'perusteluton' is the standard term for unfair treatment. 'Perusteluton irtisanominen' (unfair dismissal) is a specific legal category.

Uutisissa kerrottiin, että syytökset olivat perusteluttomia.
— The news reported that the accusations were unfounded.

In Finnish administrative culture, transparency is essential. Every decision by a government body must be 'perusteltu' (justified). If a citizen receives a rejection for a building permit or a social benefit without a clear explanation, they will describe that decision as perusteluton. This makes the word a cornerstone of civic discourse.

Asiakas piti laskua perusteluttomana.
— The customer considered the invoice unfounded.

You will also hear it in academic settings—lectures, seminars, and thesis defenses. A professor might point out a perusteluton oletus (unfounded assumption) in a student's work. It is a way of saying 'show your work' or 'where is your citation?'

Tutkimus paljasti, että monet yleiset uskomukset ovat perusteluttomia.
— The study revealed that many common beliefs are unfounded.

In Literature and Opinion Pieces: Columnists frequently use the word to attack 'perusteluton populismi' (unfounded populism) or 'perusteluton pelon lietsonta' (unfounded fear-mongering). It is a sharp tool for social critique.

Hänellä on perusteluton viha modernia taidetta kohtaan.
— He has an unfounded hatred toward modern art.

Finally, in the world of online debates (though perhaps less formal), you might see it used to shut down a 'troll' or someone making wild claims. It's the high-brow way of saying 'citation needed.'

Learning to use perusteluton involves navigating several linguistic pitfalls. Because Finnish is a highly inflected language, the errors usually fall into three categories: declension, confusion with similar words, and register mismatch.

The 'TT' Doubling Error: The most common grammatical mistake is forgetting that words ending in -ton double their 't' when they take a case ending. Many learners write perustelutonmasta instead of the correct perusteluttomasta. This is a tell-tale sign of a non-native speaker.
Confusing it with 'Aiheeton': While aiheeton also means 'unfounded' or 'groundless,' it literally means 'without a topic/cause.' Use aiheeton for things like an 'uncalled-for' comment or a 'groundless' alarm. Use perusteluton when the failure is specifically one of reasoning or argumentation.

Väärin: Tämä on perusteluton hälytys.
Oikein: Tämä on aiheeton hälytys.
— A false alarm is 'aiheeton', not 'perusteluton'.

Another mistake is using perusteluton when you actually mean 'unreasonable' in a general sense (kohtuuton). If a price is too high, it is kohtuuton (excessive). It is only perusteluton if the seller literally cannot explain why the price changed.

Väärin: Hintapyyntö on perusteluton.
Oikein: Hintapyyntö on kohtuuton.
— Unless you are critiquing the calculation, 'unreasonable' price is usually 'kohtuuton'.

Learners also struggle with the partitive case in 'it is...' structures. Remember: On perusteluton väite (Noun focus) vs. On perustelutonta väittää (Action focus). If you are describing an action (to claim, to do, to say), you MUST use the partitive perustelutonta.

On perustelutonta syyttää häntä ilman todisteita.
— It is unfounded to accuse him without evidence. (Partitive needed for the infinitive 'syyttää').

Register Errors: Using perusteluton in a very casual text message might sound slightly stiff or 'kirjakielinen' (literary). In spoken language, people might say 'ihan tyhmä juttu' or 'ei mitään järkeä.' However, at the B2 level, using perusteluton correctly in a professional email will make you sound highly competent.

Vaikka puhekielessä käytetään muita sanoja, perusteluton on paras valinta virallisessa tekstissä.
— Even though other words are used in speech, 'perusteluton' is the best choice in official text.

To truly master perusteluton, you need to know how it sits within a family of related concepts. Finnish has several ways to say 'baseless' or 'unjustified,' each with a slightly different flavor.

Aiheeton vs. Perusteluton: As mentioned, aiheeton means 'groundless' or 'uncalled for.' It's often used for emotions or actions that have no external trigger. Perusteluton is about the lack of internal logic. If you are angry for no reason, it's aiheeton viha. If your argument for why you are angry is weak, it's perusteluton väite.
Pohjaton: Literally 'bottomless.' This is used more metaphorically for things like 'bottomless greed' (pohjaton ahneus) or 'unfounded fear' (pohjaton pelko), where the lack of foundation is vast and deep.
Tuulesta temmattu: An idiom meaning 'plucked from the wind.' This is the informal, colorful version of perusteluton. Use this when someone is just making things up as they go along.

Tämä väite on aivan tuulesta temmattu!
— This claim is completely plucked from the wind (made up)!

In a legal or bureaucratic context, you might also encounter lainvastainen (illegal) or mielivaltainen (arbitrary). While perusteluton means there is no reason given, mielivaltainen implies that the reason given is just the whim of the person in power.

Päätös ei ollut vain perusteluton, vaan suorastaan mielivaltainen.
— The decision was not only unfounded, but downright arbitrary.

Other alternatives include hatusta vedetty (pulled from a hat) and perusteeton. In fact, perusteeton and perusteluton are very close. Perusteeton means 'lacking grounds' (the facts), while perusteluton means 'lacking justification' (the explanation). In practice, they are often synonyms.

Onko syyte perusteeton vai perusteluton? Usein molempia.
— Is the charge groundless or unjustified? Often both.

Summary Table

Perusteluton: No logical explanation provided.
Aiheeton: No external cause or trigger.
Mielivaltainen: Based on random whim.
Tuulesta temmattu: Completely made up (informal).

How Formal Is It?

Wusstest du?

The root 'perus-' is one of the most productive in Finnish, appearing in everything from 'peruna' (potato - 'earth-pear') to 'peruskoulu' (comprehensive school).

Aussprachehilfe

UK /pe.rus.te.lu.ton/

US /pe.rus.te.lu.ton/

Primary stress on the first syllable: PE-rus-te-lu-ton.

Reimt sich auf

perusteeton aiheeton huoleton työtön koditon onnistumaton loppumaton uskoton

Häufige Fehler

Stressing the second or third syllable.
Failing to roll the 'r'.
Pronouncing the 'u' like English 'you' instead of Finnish 'u' (like 'oo' in 'boot').
Making the 't' too aspirated.
Merging the 'lu' and 'ton' syllables.

Schwierigkeitsgrad

Lesen 4/5

Common in news, but requires understanding of suffixation.

Schreiben 7/5

Tricky consonant gradation (t -> tt) and partitive use.

Sprechen 6/5

Long word, requires clear syllable articulation.

Hören 5/5

Easy to hear if you know the root 'perustelu'.

Was du als Nächstes lernen solltest

Voraussetzungen

peruste perustelu perustaa -ton (suffix) syy

Als Nächstes lernen

aiheeton mielivaltainen kohtuuton oikeutettu perusteltu

Fortgeschritten

perusteluvelvollisuus argumentointivirhe näyttötaakka diskurssi

Wichtige Grammatik

Abessive Suffix -ton/-tön

sokeriton (sugar-free), perusteluton (justification-free)

Consonant Gradation (t -> tt)

perusteluton -> perusteluttoman

Partitive in 'It is' expressions

On perustelutonta sanoa niin.

Adjective-Noun Agreement

perusteluttomissa väitteissä

Essive Case for 'As'

Pidin sitä perusteluttomana.

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Beispiele nach Niveau

Se on perusteluton.

It is unfounded.

Simple nominative singular.

Tämä ei ole perusteluton.

This is not unfounded.

Negative construction.

Hän on perusteluton.

He/She is unfounded (unjustified).

Used for a person's behavior.

Onko se perusteluton?

Is it unfounded?

Simple question.

Se on perusteluton pelko.

It is an unfounded fear.

Adjective modifying a noun.

Syytös on perusteluton.

The accusation is unfounded.

Subject + verb + adjective.

Lasku oli perusteluton.

The bill was unfounded.

Past tense 'oli'.

Hän sanoi: 'Perusteluton'.

He said: 'Unfounded'.

Direct quote.

Päätös vaikuttaa perusteluttomalta.

The decision seems unfounded.

Ablative case with 'vaikuttaa'.

En hyväksy perustelutonta kritiikkiä.

I don't accept unfounded criticism.

Partitive object.

Miksi tämä on perusteluton?

Why is this unfounded?

Interrogative 'miksi'.

Hän teki perusteluttoman valinnan.

He made an unfounded choice.

Accusative object.

Onko väite täysin perusteluton?

Is the claim completely unfounded?

Adverb 'täysin' used for emphasis.

Puhut perusteluttomia asioita.

You are saying unfounded things.

Plural partitive.

Se oli perusteluton viive.

It was an unjustified delay.

Noun phrase.

Tämä on perusteluton oletus.

This is an unfounded assumption.

Adjective + noun.

On perustelutonta väittää, että hän valehtelee.

It is unfounded to claim that he is lying.

Partitive 'perustelutonta' with infinitive.

Hän sai perusteluttoman varoituksen töissä.

He received an unjustified warning at work.

Genitive/Accusative case.

Kritiikki oli monin paikoin perustelutonta.

The criticism was in many places unfounded.

Partitive adjective.

Vältä perusteluttomia johtopäätöksiä.

Avoid unfounded conclusions.

Plural partitive.

Hänellä on perusteluton viha naapuria kohtaan.

He has an unfounded hatred toward the neighbor.

Adjective + noun.

Onko hinnan korotus perusteluton?

Is the price increase unjustified?

Compound noun 'hinnankorotus' (or separate).

Oikeus hylkäsi perusteluttoman kanteen.

The court rejected the unfounded lawsuit.

Genitive/Accusative object.

Hän puhui perusteluttomasta pelosta.

He spoke of an unfounded fear.

Elative case.

Hallituksen esitys on asiantuntijoiden mukaan perusteluton.

The government's proposal is unfounded according to experts.

Genitive + mukaan construction.

Perusteluton irtisanominen voi johtaa oikeusjuttuun.

Unjustified dismissal can lead to a lawsuit.

Subject position.

On täysin perustelutonta olettaa, että kaikki ovat samaa mieltä.

It is completely unfounded to assume that everyone agrees.

Dummy 'on' structure with partitive.

Artikkeli sisälsi useita perusteluttomia väitteitä.

The article contained several unfounded claims.

Plural partitive object.

Hänen optimismissaan oli jotain perustelutonta.

There was something unfounded about his optimism.

Partitive used for abstract quality.

Työnantajan vaatimus oli täysin perusteluton.

The employer's demand was completely unfounded.

Predicate adjective.

Älä tee perusteluttomia muutoksia suunnitelmaan.

Do not make unfounded changes to the plan.

Plural partitive object.

Valitus hylättiin perusteluttomana.

The complaint was rejected as unfounded.

Essive case 'perusteluttomana'.

Teorian perusteluton luonne kävi ilmi kokeissa.

The unfounded nature of the theory became apparent in the experiments.

Genitive modifying 'luonne'.

Hän kritisoi markkinoiden perustelutonta uskoa kasvuun.

He criticized the market's unfounded belief in growth.

Adjective modifying 'usko'.

On perustelutonta väittää, etteikö historialla olisi merkitystä.

It is unfounded to claim that history would not have significance.

Complex 'etteikö' clause.

Päätöksenteko vaikutti ulkopuolisista täysin perusteluttomalta.

The decision-making seemed completely unfounded to outsiders.

Ablative with 'vaikuttaa'.

Hänen argumentaationsa oli perustelutonta ja sekavaa.

His argumentation was unfounded and confusing.

Partitive adjectives.

Säädös poisti perusteluttoman edun tietyiltä yrityksiltä.

The regulation removed an unjustified advantage from certain companies.

Accusative object.

Tutkija totesi väitteet tieteellisesti perusteluttomiksi.

The researcher stated the claims to be scientifically unfounded.

Translative plural 'perusteluttomiksi'.

Perusteluton optimismi voi olla vaarallista taloudessa.

Unfounded optimism can be dangerous in the economy.

Adjective + noun as subject.

Diskussio jäi pyörimään perusteluttomien oletusten ympärille.

The discussion kept revolving around unfounded assumptions.

Genitive plural.

Kirjoittaja purkaa teoksessaan nykyajan perustelutonta kiirettä.

In the work, the author deconstructs the unfounded rush of modern times.

Partitive object.

On ontologisesti perustelutonta väittää näin.

It is ontologically unfounded to claim so.

Use of technical adverb 'ontologisesti'.

Hänen toimintansa oli täysin perustelutonta vallankäyttöä.

His actions were a completely unjustified exercise of power.

Partitive complement.

Lainsäätäjä pyrki karsimaan perusteluttomia erivapauksia.

The legislator aimed to prune away unjustified exemptions.

Plural partitive object.

Kyseessä on perusteluton ja kohtuuton vaatimus.

It is a question of an unfounded and unreasonable demand.

Nominative complement.

Hän piti puheen perustelutonta vihaa vastaan.

He gave a speech against unfounded hatred.

Partitive object of 'vastaan'.

Metaforan käyttö tässä yhteydessä on perustelutonta.

The use of a metaphor in this context is unjustified.

Partitive predicate.

Häufige Kollokationen

perusteluton irtisanominen

täysin perusteluton

perusteluton pelko

perusteluton väite

perusteluton optimismi

perusteluton viive

perusteluton etu

perusteluton syytös

tieteellisesti perusteluton

moraalisesti perusteluton

Häufige Phrasen

Se on aivan perustelutonta.

— That is completely unfounded. Used to dismiss a point in a conversation.

Kun häntä syytettiin, hän vastasi: 'Se on aivan perustelutonta'.

Pitäisin sitä perusteluttomana.

— I would consider it unfounded. A polite way to disagree.

Pitäisin tuota väitettä tässä vaiheessa perusteluttomana.

Ei kai se ole perusteluton?

— It isn't unfounded, is it? Expressing doubt.

Hinnankorotus tuli yllätyksenä. Ei kai se ole perusteluton?

Perusteluton oletus.

— An unfounded assumption. Common in logic.

Koko teoriasi nojaa yhteen perusteluttomaan oletukseen.

Perusteluton vaatimus.

— An unjustified demand.

Työnantajan uusi vaatimus on täysin perusteluton.

Perusteluton kritiikki.

— Unfounded criticism.

Hän ei välitä perusteluttomasta kritiikistä.

Perusteluton viha.

— Unfounded hatred.

Mistä tämä perusteluton viha kumpuaa?

Perusteluton luottamus.

— Unfounded trust.

Hänellä oli perusteluton luottamus onneensa.

Perusteluton usko.

— Unfounded belief.

Tämä on vain perustelutonta uskoa parempaan.

Perusteluton muutos.

— An unjustified change.

Teimme suunnitelmaan perusteluttoman muutoksen.

Wird oft verwechselt mit

perusteluton vs aiheeton

Aiheeton is 'without cause', perusteluton is 'without logical explanation'.

perusteluton vs kohtuuton

Kohtuuton means 'unreasonable' or 'excessive' (usually about price or work).

perusteluton vs perusteeton

Very similar; perusteeton focuses on lack of facts, perusteluton on lack of reasoning.

Redewendungen & Ausdrücke

"tuulesta temmattu"

— Completely made up; having no basis in reality.

Hänen tarinansa oli aivan tuulesta temmattu.

informal

"hatusta vedetty"

— Randomly guessed or fabricated without evidence.

Nuo prosentit ovat ihan hatusta vedettyjä.

informal

"pohjaa vailla"

— Lacking a bottom/foundation.

Väite on täysin pohjaa vailla.

neutral

"rakentaa pilvilinnoja"

— To build castles in the air (unfounded dreams).

Hän vain rakentaa perusteluttomia pilvilinnoja.

metaphorical

"puhua läpiä päähänsä"

— To talk nonsense/unfounded things.

Älä kuuntele häntä, hän puhuu taas läpiä päähänsä.

slang

"olla huteralla pohjalla"

— To be on shaky ground (unfounded logic).

Koko argumenttisi on huteralla pohjalla.

neutral

"vailla päätä eikä häntä"

— Without head or tail (nonsensical/unfounded).

Tässä jutussa ei ole päätä eikä häntä.

informal

"tyhjästä nyhjäisty"

— Scraped from nothing; created without basis.

Tämä ongelma on aivan tyhjästä nyhjäisty.

informal

"savua ilman tulta"

— Smoke without fire (often used to say a rumor IS founded, but used negatively here).

Tämä on savua ilman tulta, täysin perustelutonta.

neutral

"olla ilmaa"

— To be air (to have no substance/foundation).

Hänen lupauksensa olivat vain ilmaa.

metaphorical

Leicht verwechselbar

perusteluton vs perustelematon

Looks similar.

Perustelematon means 'not (yet) justified', while perusteluton means 'lacking any justification'.

Perustelematon väite (A claim that hasn't been explained yet).

perusteluton vs perinteinen

Starts with 'per-'.

Perinteinen means 'traditional'.

Perinteinen ruoka.

perusteluton vs perusteellinen

Same root.

Perusteellinen means 'thorough' or 'in-depth'.

Perusteellinen tutkimus.

perusteluton vs perustettu

Same root.

Perustettu means 'founded' or 'established'.

Vuonna 1990 perustettu yritys.

perusteluton vs aiheeton

Similar meaning.

Aiheeton is 'groundless' in the sense of no trigger; perusteluton is 'baseless' in logic.

Aiheeton hälytys.

Satzmuster

Se on perusteluton.

Väite on [adverb] perusteluton.

Väite on täysin perusteluton.

On perustelutonta [verbi].

On perustelutonta pelätä.

Pitäisikö [kohde] perusteluttomana?

Pidätkö tätä perusteluttomana?

Syy on perusteluton.

[Substantiivi] osoittautui perusteluttomaksi.

Pelko osoittautui perusteluttomaksi.

Perusteluton [substantiivi] johti [seuraukseen].

Perusteluton viive johti tappioihin.

Argumentointi on monin paikoin perustelutonta.

Wortfamilie

Substantive

peruste (ground/basis)

perustelu (justification)

perustaminen (founding)

perustaja (founder)

Verben

perustaa (to found/base)

perustella (to justify/argue for)

Adjektive

perusteltu (justified)

perusteellinen (thorough)

perus- (basic)

Verwandt

syy (reason)

aihe (cause)

todiste (evidence)

logiikka (logic)

väite (claim)

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So verwendest du es

frequency

Common in professional, legal, and news contexts. Rare in very casual slang.

Häufige Fehler

perustelutonmasta → perusteluttomasta
The 't' doubles to 'tt' in declined forms of -ton words.
On perusteluton sanoa niin. → On perustelutonta sanoa niin.
Use the partitive case for the adjective in 'On [adjective] [infinitive]' structures.
perusteluton hälytys → aiheeton hälytys
A 'false alarm' is 'aiheeton', not 'perusteluton'.
perusteluton hinta → kohtuuton hinta
For prices, 'kohtuuton' (unreasonable/excessive) is more common unless you specifically mean the calculation is missing.
perusteluton ihminen → ihminen, jolla ei ole perusteita
'Perusteluton' describes things, not usually people.

Tipps

The -ton Rule

Whenever you see a Finnish word ending in -ton, remember it means 'without'. Peruste (reason) + ton (without) = reasonless.

Legal Language

If you are reading a Finnish employment contract or legal news, look out for 'perusteluton'. It's a key term for your rights.

Rolling R

Make sure to roll the 'r' in 'perusteluton'. It's a small detail that makes you sound much more native.

Polite Disagreement

Use 'perusteluton' instead of 'valhe' (lie) to be more professional when you think someone is wrong.

Case Agreement

Remember that if the noun is in the partitive, the adjective must be too: 'perustelutonta kritiikkiä'.

News Keywords

This is a high-frequency 'news word'. Listen for it when politicians are debating.

Finnish Logic

Finns value logic. Calling something 'perusteluton' is a serious intellectual critique in Finland.

Base-Less

Think of 'Perus' as 'Base' and '-ton' as '-less'. Baseless.

Emphasis

You can add 'täysin' (completely) before it to sound more certain: 'täysin perusteluton'.

Essive Case

Use the essive 'perusteluttomana' to say 'as unfounded'. 'Pidän sitä perusteluttomana' (I consider it [as] unfounded).

Einprägen

Eselsbrücke

Think of 'Peruste' as 'Basis' and '-ton' as 'Minus'. So, Basis-Minus = Baseless.

Visuelle Assoziation

Imagine a house floating in the air with no foundation underneath it. The house is the 'väite' (claim) and the lack of ground is 'perusteluton'.

Word Web

perustelu peruste perustaa perusteltu perusteluton perustelematon perustavanlaatuinen perus

Herausforderung

Try to find three news headlines today that use the word 'perusteluton' or its opposite 'perusteltu'.

Wortherkunft

Derived from the Proto-Finnic root '*perusta', which relates to the bottom or foundation of something. It is cognate with words in other Uralic languages referring to the base or rear of an object.

Ursprüngliche Bedeutung: Originally referred to the physical base or bottom (perä) of a structure or vessel.

Uralic / Finnic

Kultureller Kontext

Calling someone's argument 'perusteluton' is formal and polite, but it is a strong intellectual dismissal. Use with caution in personal relationships.

English speakers might use 'random' or 'unfair' where a Finn would more precisely use 'perusteluton'.

Used frequently in the Finnish Supreme Court (Korkein oikeus) rulings. Appears in the Finnish translation of the UN Declaration of Human Rights regarding arbitrary arrest. Commonly found in critiques of 'perusteluton optimismi' in Finnish economic history.

Im Alltag üben

Kontexte aus dem Alltag

Legal/Workplace

perusteluton irtisanominen
perusteluton varoitus
hakea muutosta perusteluttomaan päätökseen
perusteluton etu

Academic/Research

perusteluton oletus
perusteluton johtopäätös
metodologisesti perusteluton
väite jäi perusteluttomaksi

News/Politics

perusteluton leikkaus
perusteluton lupaus
perusteluton pelon lietsonta
täysin perusteluton syytös

Personal Feelings

perusteluton pelko
perusteluton viha
perusteluton optimismi
tuntea perustelutonta syyllisyyttä

Customer Service

perusteluton lasku
perusteluton hinnanmuutos
pitää vaatimusta perusteluttomana
perusteluton viive toimituksessa

Gesprächseinstiege

"Onko mielestäsi tämä päätös perusteluton?"

"Miksi jotkut ihmiset tekevät perusteluttomia syytöksiä?"

"Oletko koskaan saanut perustelutonta kritiikkiä?"

"Onko perusteluton optimismi hyvästä vai pahasta?"

"Miten vastaat, jos joku sanoo väitettäsi perusteluttomaksi?"

Tagebuch-Impulse

Kirjoita tilanteesta, jossa tunsit perustelutonta pelkoa. Mitä tapahtui?

Pohdi, onko jokin yhteiskunnallinen sääntö mielestäsi perusteluton.

Miten reagoit, jos saat töissä tai koulussa perustelutonta palautetta?

Onko olemassa sellaista asiaa kuin perusteluton rakkaus?

Analysoi jotakin uutista: olivatko siinä esitetyt väitteet perusteltuja vai perusteluttomia?

Häufig gestellte Fragen

10 Fragen

In most everyday contexts, they are interchangeable. However, 'perusteeton' literally means 'without grounds' (facts), whereas 'perusteluton' means 'without justification' (the explanation or argument). If you can't prove it, it's perusteeton. If you can't explain it, it's perusteluton.

The plural partitive is 'perusteluttomia'. For example: 'En halua kuulla perusteluttomia väitteitä' (I don't want to hear unfounded claims).

Not usually. You describe a person's actions, claims, or feelings as 'perusteluton', but calling a person 'perusteluton' would sound strange. You might say 'Hän on perustelematon' if they never explain themselves, but it's rare.

Yes, it is very common in newspapers, news broadcasts, and professional life. It is less common in casual spoken Finnish, where people might use idioms like 'tuulesta temmattu'.

Yes, in all cases except the nominative singular. For example: perusteluttoman (gen), perustelutonta (par), perusteluttomassa (ine).

It is typically considered a B2 level word because it is abstract and used in formal or professional contexts.

The most common opposite is 'perusteltu' (justified).

Yes, in a formal context like 'perusteluton irtisanominen' (unfair/unjustified dismissal).

No, it is a neutral, professional word. However, using it to describe someone's opinion is a very firm way of disagreeing.

You can say 'Se on perustelutonta' or 'Väite on perusteluton'.

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