This page in your language

فارسی

العربية

Deutsch

Español

Français

日本語

한국어

Português

中文

हिन्दी

Home
Learn
Spanish
Vocabulary
negativamente

B1 adverb #1,500 most common 8 min read

negativamente

Top 1,500

At the A1 level, 'negativamente' is a very long and complex word. You probably won't use it yet. Instead, you use 'no' or 'mal'. For example, instead of saying 'It affects me negatively', you might say 'No es bueno' or 'Es malo'. However, it's good to recognize the '-mente' ending, which you will see in many Spanish adverbs later. Think of it as the 'badly' version of a word. If you see 'negativamente', just remember it means something is going in a 'no' direction. You might see it in very simple instructions or signs, but your focus should be on the basic adjective 'negativo'. At this stage, just knowing that '-mente' means '-ly' is a huge win for your vocabulary growth. Don't worry about pronouncing it perfectly yet, as it has many syllables (ne-ga-ti-va-men-te). Just focus on the fact that it's the opposite of 'positivamente'. If a teacher says 'No respondas negativamente', they just want you to be more positive! You are building the foundation here.

By A2, you are starting to see longer words and more adverbs. You know 'bien' and 'mal', and now you are introducing 'positivamente' and 'negativamente'. You might use this word when talking about your health or your studies in a simple way. For example: 'El clima afecta negativamente a mis planes'. It's a step up from 'El clima es malo para mis planes'. You are beginning to describe *how* things happen. You should practice the structure: Verb + negativamente. It's a great word to use in your writing tasks to show the examiner that you know how to form adverbs from adjectives. Remember: take 'negativo', change it to 'negativa', and add 'mente'. This rule works for almost all adverbs! You might also hear it in weather reports or simple news stories. If you hear 'La economía va negativamente', you know things are not going well. It's a useful 'bridge' word as you move toward intermediate Spanish. Keep it in your 'formal' toolbox for when you want to sound a bit more serious than just using 'mal'.

At B1, 'negativamente' should be a regular part of your vocabulary. You are expected to discuss opinions, describe experiences, and explain advantages and disadvantages. This word is perfect for that. Instead of saying 'La televisión es mala para los niños', you can say 'La televisión influye negativamente en el desarrollo de los niños'. This sounds much more like a B1 student. You should be comfortable using it with verbs like 'afectar', 'influir', and 'reaccionar'. You also need to be careful with its placement—usually after the verb. You'll encounter this word in reading passages about the environment, technology, and society. It's also very common in the 'Opinión' section of newspapers. Practice using it to contrast ideas: 'Aunque algunos lo ven positivamente, otros reaccionan negativamente'. This shows you can handle complex sentence structures. Also, start noticing how it's used in 'se' impersonal sentences, like 'Se valoró negativamente su actitud'. This is the level where you move from 'basic' to 'functional' Spanish, and 'negativamente' is a key tool for that transition.

At the B2 level, you should use 'negativamente' with precision and variety. You understand that it's not just a synonym for 'mal', but a way to describe a specific type of impact or manner. You should be able to modify it with other adverbs: 'extremadamente negativamente', 'bastante negativamente'. You are also expected to know its synonyms like 'desfavorablemente' and use them to avoid repetition in your essays. In B2 listening exams, you might hear speakers use 'negativamente' to express subtle criticism or to describe complex social phenomena. You should also be aware of the 'two adverbs' rule: if you say 'He reacted sadly and negatively', you say 'Reaccionó triste y negativamente'. This is a classic B2 grammar point. You should also be comfortable using the word in professional contexts, such as describing a job performance review or a scientific result. At this level, you aren't just using the word; you are using it to create a specific tone—usually one of objective analysis or formal critique. It's a word that helps you sound more like a native speaker in professional and academic settings.

For C1 learners, 'negativamente' is a basic building block used to construct complex arguments. You should be looking at the nuances of its use compared to words like 'perjudicialmente', 'adversamente', or 'nocivamente'. You understand that 'negativamente' is often the 'neutral' choice among these. You might use it in a thesis or a high-level business report to describe correlations: 'La variable X correlaciona negativamente con el resultado Y'. You also recognize its use in idiomatic or semi-formal expressions and can identify when a speaker is using it ironically or to downplay a significant problem (litotes). Your pronunciation should be fluid, handling the seven syllables without hesitation. You should also be able to use it in complex sentence structures, such as 'No es que haya influido negativamente per se, sino que...'. At this level, you are also sensitive to the 'weight' of the word in different Spanish-speaking cultures—some might find it too direct in certain social situations and prefer more indirect ways of expressing negativity. You use 'negativamente' to provide clarity and structure to your advanced discourse.

At the C2 level, 'negativamente' is used with complete mastery of register and style. You can use it to navigate the most formal academic papers or the most nuanced literary texts. You understand its etymological roots and how it fits into the broader system of Spanish adverbs. You might analyze how its use has changed in political discourse to frame certain issues. You are also capable of using it in sophisticated rhetorical devices. For example, you might use it in a complex critique of a philosophical work: 'La propuesta es valorada negativamente no por su contenido, sino por su falta de rigor metodológico'. You can effortlessly switch between 'negativamente' and its more obscure synonyms like 'siniestramente' or 'infaustamente' depending on the desired literary effect. You also understand the prosody of the word within a long, complex sentence, ensuring that the rhythm of your speech remains natural. At this level, the word is just one of thousands of tools you use to express precise shades of meaning, and you can explain its usage and nuances to others with the authority of a near-native or native speaker.

Practice it Examples Notes & Tips

negativamente in 30 Seconds

Negativamente is a Spanish adverb meaning 'negatively' or 'unfavorably', commonly used to describe harmful impacts or pessimistic reactions in formal contexts.
It is formed from the feminine adjective 'negativa' plus the suffix '-mente', and it remains invariable regardless of gender or number.
Commonly paired with verbs like 'afectar', 'influir', and 'reaccionar', it typically follows the verb in a sentence for natural flow.
While 'mal' is used in casual speech, 'negativamente' is preferred in academic, professional, and journalistic Spanish to provide objective analysis.

The word negativamente is a Spanish adverb of manner. It is formed by taking the feminine form of the adjective negativo (negative) and adding the suffix -mente, which is the Spanish equivalent of the English suffix -ly. At its core, it describes actions, processes, or reactions that occur in an unfavorable, pessimistic, or harmful way. Understanding this word is crucial for B1 learners because it allows for more nuanced descriptions of impact and consequence beyond simple adjectives.

Grammatical Function: As an adverb, it primarily modifies verbs (e.g., 'afectar negativamente'), but it can also modify adjectives or other adverbs in specific contexts to indicate a negative quality or degree.

El estrés puede afectar negativamente a tu salud física y mental.

Example: Stress can negatively affect your physical and mental health.

In a broader sense, 'negativamente' implies a direction towards the 'minus' side of a scale. Whether discussing financial results, social interactions, or scientific outcomes, the word signals that the result is not what was desired or that it carries a detrimental weight. It is often used in formal reports, news, and psychological discussions to provide a professional tone to criticism or bad news.

Semantic Range: It covers everything from a 'negative response' (responding with 'no') to a 'negative impact' (causing harm or decline).

La crítica fue recibida negativamente por el autor.

When we look at the word's impact in conversation, it often serves as a 'softener' or a way to categorize an effect without using harsh emotional language. Instead of saying something is 'bad', saying it 'impacts negativamente' sounds more objective and analytical. This is why you will find it frequently in academic and professional Spanish.

Los cambios climáticos influyen negativamente en las cosechas.

Contrast: Unlike 'mal', which is a general term for 'badly', 'negativamente' specifically points to the nature of the result or the attitude behind an action.

No pienses tan negativamente sobre el futuro.

El público reaccionó negativamente al anuncio.

Using 'negativamente' correctly involves understanding its placement and the verbs it most naturally pairs with. In Spanish, adverbs of manner like 'negativamente' usually follow the verb they modify. This provides a clear connection between the action and the quality of that action. For example, in 'afectar negativamente', the adverb specifies the *way* in which something is affected.

Common Verb Pairings: Afectar, influir, reaccionar, responder, impactar, valorar, juzgar, y pensar.

La empresa fue valorada negativamente por los inversores.

When constructing sentences, remember that 'negativamente' is invariable. It does not change for gender or number, unlike the adjective 'negativo/a/os/as'. This makes it easier to use once you master the placement. If you want to emphasize the adverb, you might occasionally see it at the beginning of a sentence, followed by a comma, though this is less common than placing it after the verb.

No deberías juzgar a la gente tan negativamente.

Degrees of Intensity: You can modify 'negativamente' with other adverbs like 'muy', 'bastante', 'tan', or 'extremadamente' to show the level of negativity.

El resultado impactó muy negativamente en la moral del equipo.

In professional writing, 'negativamente' is often used in the passive voice or with impersonal 'se' constructions to maintain objectivity. For instance, 'Se ha valorado negativamente la propuesta' (The proposal has been evaluated negatively). This avoids blaming a specific person and focuses on the evaluation itself.

Muchos usuarios respondieron negativamente a la nueva política.

Formal vs. Informal: While 'mal' is common in daily speech, 'negativamente' is the preferred choice in essays, business meetings, and news reporting.

¿Por qué siempre reaccionas negativamente ante mis sugerencias?

You will encounter 'negativamente' in various settings, ranging from the evening news to a doctor's office. Its versatility makes it a staple of mid-to-high level Spanish communication. In the world of finance and economics, it is used to describe market trends or the impact of new laws. 'La inflación afecta negativamente al consumo' is a sentence you might hear on a financial podcast.

In the News: Journalists use it to describe public reaction to political decisions or the effects of natural disasters on the economy.

La bolsa de valores cerró negativamente tras el anuncio del banco central.

In psychological and self-help contexts, the word is used to discuss mindset and mental health. Therapists might talk about 'pensar negativamente' (thinking negatively) and how it contributes to anxiety. Here, the word takes on a more personal and emotional weight, focusing on the internal state of the individual rather than external economic factors.

Hablarse a uno mismo negativamente daña la autoestima.

In Education: Teachers use it in reports to describe a student's behavior or performance without being overly aggressive.

La falta de asistencia influyó negativamente en sus notas finales.

Scientific research is another common place for this word. Researchers describe how certain variables affect an experiment's outcome. 'La temperatura influyó negativamente en el crecimiento de las bacterias' is a typical scientific observation. It provides a precise way to describe a correlation that is inverse or detrimental.

El experimento resultó negativamente en la primera fase.

In Customer Service: Reviews and feedback often use this word to describe an experience with a product or service.

El servicio fue calificado negativamente por la mayoría de los clientes.

One of the most frequent mistakes learners make is confusing the adverb 'negativamente' with the adjective 'negativo'. Remember that 'negativo' must agree in gender and number with the noun it modifies, while 'negativamente' never changes. For example, you say 'un impacto negativo' (adjective) but 'impactar negativamente' (adverb). Mixing these up is a common sign of a B1 learner still mastering word classes.

Mistake: Adjective vs. Adverb: Incorrect: 'Eso afectó negativo'. Correct: 'Eso afectó negativamente'.

No es correcto decir 'él piensa negativo'; lo correcto es 'él piensa negativamente'.

Another mistake is the over-reliance on 'negativamente' when 'no' or 'mal' would be more natural in informal conversation. While 'negativamente' is correct, saying 'Me fue negativamente en el examen' sounds very stiff. In that case, 'Me fue mal' is much better. Reserve 'negativamente' for when you are describing the *manner* of an effect or a formal response.

Evita usarlo en frases simples como 'Hoy me siento negativamente'. Di 'Hoy me siento mal' o 'Estoy pesimista'.

Spelling Errors: Learners sometimes forget the 'a' in the middle: 'negativmente'. It must be 'negativAmente' because adverbs are formed from the feminine singular adjective.

Recuerda: Adjetivo femenino (negativa) + mente = negativamente.

Placement can also be tricky. In English, we often put the adverb before the verb ('It negatively affected...'). In Spanish, placing it before the verb ('Negativamente afectó...') is grammatically possible but often sounds poetic or overly dramatic. Stick to placing it after the verb for standard communication.

Lo más natural es: 'Afectó negativamente a la empresa'.

Double Negatives: Be careful not to create confusing double negatives like 'No reaccionó negativamente' unless you specifically mean they reacted positively or neutrally.

'No respondió negativamente' significa que su respuesta fue positiva o al menos no mala.

Understanding 'negativamente' is easier when you compare it to its synonyms and related terms. The most direct synonym is 'desfavorablemente'. While 'negativamente' is very common, 'desfavorablemente' is slightly more formal and is often used in legal or administrative contexts, such as 'una resolución desfavorable'.

Comparison: Negativamente vs. Desfavorablemente: Negativamente is general; desfavorablemente specifically implies that the outcome was not in one's favor.

El juez falló desfavorablemente (instead of negativamente).

Another related word is 'pesimistamente'. This refers specifically to an attitude or a way of looking at the future. While 'negativamente' can describe an objective impact ('The rain affected the crops negatively'), 'pesimistamente' describes a subjective outlook ('He looks at the situation pessimistically').

Él siempre habla pesimistamente sobre la economía.

Opposite: Positivamente: The direct antonym. It follows the same rules and is used in the same structures.

La noticia influyó positivamente en los ánimos del grupo.

Then there is 'perjudicialmente'. This is a much stronger word. While 'negativamente' means 'in a bad way', 'perjudicialmente' means 'in a harmful or damaging way'. If a medicine has a negative side effect, you might use 'negativamente', but if it causes serious damage, 'perjudicialmente' is more accurate.

El humo afecta perjudicialmente a los pulmones.

Informal Alternative: Mal: In 90% of casual conversations, 'mal' can replace 'negativamente'.

Me salió mal el plan (instead of 'el plan resultó negativamente').

How Formal Is It?

Formal

Informal

Difficulty Rating

Grammar to Know

Examples by Level

No pienses negativamente.

Don't think negatively.

Simple imperative with an adverb.

Él habla negativamente de la comida.

He speaks negatively about the food.

Adverb modifying the verb 'hablar'.

La noticia es mala, pero no reacciones negativamente.

The news is bad, but don't react negatively.

Contrast between adjective 'mala' and adverb 'negativamente'.

¿Por qué respondes negativamente?

Why do you respond negatively?

Question using an adverb of manner.

Ella siempre ve todo negativamente.

She always sees everything negatively.

Adverb of frequency 'siempre' used with 'negativamente'.

El examen salió negativamente para él.

The exam turned out negatively for him.

Using 'salir' to mean 'to turn out'.

No hables negativamente de tus amigos.

Don't speak negatively of your friends.

Negative imperative.

El resultado fue valorado negativamente.

The result was valued negatively.

Passive voice structure.

El frío afecta negativamente a las plantas.

The cold affects the plants negatively.

Verb 'afectar' + 'a' (personal/object marker).

Muchos clientes opinan negativamente del servicio.

Many customers have a negative opinion of the service.

Verb 'opinar' followed by 'negativamente'.

Si trabajas negativamente, no tendrás éxito.

If you work negatively, you won't have success.

Conditional 'si' clause.

El ruido influye negativamente en mi estudio.

The noise influences my study negatively.

Verb 'influir' + 'en'.

Él respondió negativamente a la invitación.

He responded negatively to the invitation.

Past tense 'respondió'.

No quiero que me juzgues negativamente.

I don't want you to judge me negatively.

Subjunctive 'juzgues' after 'querer que'.

La película fue criticada negativamente por la prensa.

The movie was negatively criticized by the press.

Passive voice with 'por'.

A veces, pensamos negativamente sin razón.

Sometimes, we think negatively without reason.

Adverbial phrase 'a veces'.

El uso excesivo de redes sociales puede afectar negativamente a los jóvenes.

Excessive use of social media can negatively affect young people.

Modal verb 'puede' + infinitive.

La empresa reaccionó negativamente ante la nueva ley.

The company reacted negatively to the new law.

Prepositional phrase 'ante la nueva ley'.

Es importante no dejarse influir negativamente por los demás.

It's important not to let oneself be negatively influenced by others.

Reflexive passive 'dejarse influir'.

Su actitud fue valorada negativamente en la entrevista.

His attitude was valued negatively in the interview.

Past participle 'valorada' agreeing with 'actitud'.

Si sigues actuando negativamente, perderás tu empleo.

If you keep acting negatively, you will lose your job.

Gerund 'actuando' after 'seguir'.

La falta de sueño impacta negativamente en el rendimiento escolar.

Lack of sleep negatively impacts school performance.

Verb 'impactar' + 'en'.

Muchos expertos ven negativamente el futuro del petróleo.

Many experts see the future of oil negatively.

Direct object 'el futuro' modified by the verb-adverb combo.

No deberías hablar tan negativamente de tu propia ciudad.

You shouldn't speak so negatively about your own city.

Adverb 'tan' modifying 'negativamente'.

La huelga de transporte ha repercutido negativamente en el turismo local.

The transport strike has had a negative impact on local tourism.

Present perfect 'ha repercutido'.

El informe evalúa negativamente la gestión del director anterior.

The report negatively evaluates the previous director's management.

Transitive verb 'evaluar'.

Ciertos hábitos alimenticios pueden incidir negativamente en la salud cardiovascular.

Certain eating habits can negatively affect cardiovascular health.

Verb 'incidir' + 'en'.

La propuesta fue acogida negativamente por la junta directiva.

The proposal was negatively received by the board of directors.

Passive voice with 'acogida' (received/welcomed).

Es sorprendente cómo un solo comentario puede condicionar negativamente a un grupo.

It's surprising how a single comment can negatively condition a group.

Indirect question 'cómo...'.

Los resultados trimestrales han afectado negativamente a las acciones de la compañía.

Quarterly results have negatively affected the company's shares.

Verb 'afectar' + 'a' (personal/specific object).

No podemos permitir que el pesimismo nos afecte negativamente en este proyecto.

We cannot allow pessimism to negatively affect us in this project.

Subjunctive 'afecte' after 'permitir que'.

El candidato se expresó negativamente sobre sus oponentes durante el debate.

The candidate spoke negatively about his opponents during the debate.

Reflexive verb 'expresarse'.

La devaluación de la moneda ha lastrado negativamente el crecimiento industrial.

The devaluation of the currency has negatively hindered industrial growth.

Advanced verb 'lastrar' (to hinder/weigh down).

Cualquier cambio brusco en la política fiscal podría ser interpretado negativamente por los mercados.

Any sudden change in fiscal policy could be interpreted negatively by the markets.

Conditional passive 'podría ser interpretado'.

La falta de transparencia suele correlacionar negativamente con la confianza del consumidor.

Lack of transparency usually correlates negatively with consumer confidence.

Technical verb 'correlacionar'.

Se ha especulado sobre cómo la inteligencia artificial podría transformar negativamente el mercado laboral.

There has been speculation about how AI could negatively transform the labor market.

Impersonal 'se' + 'especulado'.

El sesgo cognitivo nos lleva a procesar negativamente la información que contradice nuestras creencias.

Cognitive bias leads us to negatively process information that contradicts our beliefs.

Infinitive 'procesar' as a complement.

La crítica literaria se posicionó negativamente ante la última novela del autor.

Literary critics positioned themselves negatively towards the author's latest novel.

Reflexive 'posicionarse'.

Es imperativo evitar que los prejuicios influyan negativamente en la toma de decisiones.

It is imperative to prevent prejudices from negatively influencing decision-making.

Subjunctive 'influyan' after 'evitar que'.

La saturación publicitaria acaba revirtiendo negativamente en la imagen de la marca.

Advertising saturation ends up reflecting negatively on the brand image.

Periphrasis 'acabar' + gerund.

La idiosincrasia del sistema burocrático tiende a repercutir negativamente en la agilidad administrativa.

The idiosyncrasy of the bureaucratic system tends to have a negative impact on administrative agility.

High-level vocabulary: 'idiosincrasia', 'repercutir'.

Resulta paradójico que una medida destinada al ahorro haya incidido tan negativamente en el presupuesto final.

It is paradoxical that a measure intended for savings has had such a negative impact on the final budget.

Subjunctive 'haya incidido' in a 'resulta + adjective' construction.

La dialéctica del discurso político actual se ve a menudo empañada por la tendencia a valorar negativamente al adversario.

The dialectic of current political discourse is often tarnished by the tendency to value the adversary negatively.

Passive 'se ve empañada'.

El ostracismo social al que fue sometido el artista condicionó negativamente su producción tardía.

The social ostracism to which the artist was subjected negatively conditioned his late production.

Relative clause 'al que fue sometido'.

Sería un error soslayar cómo la precariedad laboral influye negativamente en la cohesión social.

It would be a mistake to overlook how job insecurity negatively influences social cohesion.

Advanced verb 'soslayar' (to overlook/avoid).

La obsolescencia programada no solo afecta al bolsillo del consumidor, sino que impacta negativamente en el ecosistema.

Planned obsolescence not only affects the consumer's pocket but also negatively impacts the ecosystem.

Correlative conjunction 'no solo... sino que'.

La hermenéutica del texto permite discernir por qué ciertos pasajes fueron recibidos negativamente en su época.

The hermeneutics of the text allows us to discern why certain passages were received negatively in their time.

Academic vocabulary: 'hermenéutica', 'discernir'.

La falta de incentivos a la investigación podría redundar negativamente en la competitividad del país.

The lack of research incentives could result negatively in the country's competitiveness.

Verb 'redundar' + 'en'.

Common Collocations

afectar negativamente

influir negativamente

reaccionar negativamente

responder negativamente

impactar negativamente

valorar negativamente

juzgar negativamente

pensar negativamente

repercutir negativamente

incidir negativamente

Common Phrases

afectar negativamente a algo

reaccionar negativamente ante algo

valorar negativamente una propuesta

influir negativamente en alguien

responder negativamente a una pregunta

pensar negativamente sobre el futuro

impactar negativamente en la economía

juzgar negativamente a una persona

resultar negativamente

posicionarse negativamente

Often Confused With

negativamente vs negativo (adjective)

negativamente vs no (negation)

negativamente vs mal (adverb)

Idioms & Expressions

Easily Confused

negativamente vs

Sentence Patterns

How to Use It

note 1

It is more formal than 'mal'.

note 2

It is often used in the passive voice.

note 3

It is a common word in 'Opinión' columns.

Common Mistakes

You need an adverb, not an adjective, to modify a verb.
Don't forget the 'a' from the feminine adjective 'negativa'.
Use adjectives with the verb 'ser'.
'Malamente' is rarely used in standard Spanish; 'negativamente' is better.
In Spanish, the adverb usually follows the verb.

Tips

Adverb Formation

Always use the feminine form of the adjective as the base. Negativa + mente.

Formal Writing

Use this word in your DELE exams to boost your score in the writing section.

Emphasis

Stress the 'MEN' syllable to sound more like a native speaker.

Context

If you hear 'afectar', listen for 'negativamente' or 'positivamente' immediately after.

Variety

Swap it with 'desfavorablemente' in very formal reports to show off your range.

Adjective Check

Don't say 'Él es negativamente'. Say 'Él es negativo' or 'Él actúa negativamente'.

Mental Map

Associate it with the minus (-) sign in math.

News Clues

In financial news, this word often signals a drop in prices or a bad economic report.

Politeness

Use it to soften criticism by making it sound like an objective result.

Suffix Power

Once you learn 'negativamente', you can form hundreds of other adverbs using the same rule.

Memorize It

Mnemonic

Think of 'Negative' + 'Mind' (mente). It's doing something with a negative mind or manner.

Word Origin

Latin

Cultural Context

High/Formal

Common in media and education

Universal across all Spanish-speaking countries.

Practice in Real Life

Real-World Contexts

Conversation Starters

"¿Crees que las redes sociales nos afectan negativamente?"

"¿Alguna vez has reaccionado negativamente a un regalo?"

"¿Cómo evitas pensar negativamente cuando tienes un problema?"

"¿Qué factores influyen negativamente en tu productividad?"

"¿Por qué crees que la gente juzga negativamente a los demás tan rápido?"

Journal Prompts

Escribe sobre una situación que te afectó negativamente y cómo la superaste.

Describe una noticia reciente que fue recibida negativamente por el público.

¿Cómo influye el clima negativamente en tu estado de ánimo?

Reflexiona sobre la importancia de no hablar negativamente de uno mismo.

Analiza cómo la falta de sueño impacta negativamente en tu día a día.

Frequently Asked Questions

10 questions

Adverbs in Spanish do not have gender. However, it is formed using the feminine form of the adjective 'negativa'.

Yes, you can use 'muy' to intensify the adverb, just like in English 'very negatively'.

Usually, it goes right after the verb it modifies, for example: 'Afectó negativamente'.

'Mal' is more general and informal. 'Negativamente' is more specific and formal, often used for impacts or reactions.

In casual speech, people just say 'mal'. There is no shorter version of the word 'negativamente' itself.

No, 'negativamente' does not have a written accent mark because the original adjective 'negativa' doesn't have one.

Yes, but it's usually followed by a comma: 'Negativamente, el informe describe...'. This is quite formal.

Yes, it is a standard word used throughout the Spanish-speaking world.

No, you use the adjective 'negativo' with 'ser/estar'. Use 'negativamente' with action verbs.

The opposite is 'positivamente'.