Mi profesor brasileño vive aquí.

In modern Spanish, possessive words like mi, tu, su, nuestro usually replace the article, so you say mi profesor, not el mi profesor.

• mi profesor = my teacher / my professor
• el profesor = the teacher / the professor

Using both together in this basic structure sounds wrong in standard modern Spanish.

It can mean either, depending on context.

In everyday Spanish, profesor often means teacher, especially for secondary school and sometimes other educational settings. It does not always mean a university professor in the English sense.

So Mi profesor brasileño vive aquí could mean:

• My Brazilian teacher lives here
• My Brazilian professor lives here

Context tells you which one is meant.

In Spanish, most descriptive adjectives usually come after the noun.

So:

• profesor brasileño = Brazilian teacher

This is the normal word order. English usually puts the adjective first, but Spanish usually puts it after the noun.

Because profesor is masculine singular here, the adjective must agree with it.

• profesor brasileño = masculine singular
• profesora brasileña = feminine singular

Spanish adjectives often change form to match the gender and number of the noun they describe.

In Spanish, nationality words are normally not capitalized.

So you write:

• brasileño
• español
• inglés

This is different from English, where nationality words like Brazilian and Spanish are capitalized.

The ñ is a separate letter in Spanish. It sounds roughly like the ny in canyon.

So brasileño is pronounced approximately like:

• bra-si-LE-nyo

It is not the same as a plain n.

The written accent shows where the stress goes:

• a-QUÍ

In this word, the stress falls on the last syllable. The accent mark helps show the correct pronunciation and distinguishes it as the word aquí.

Vive is the third person singular present tense of vivir (to live).

So it can mean:

• he lives
• she lives
• you live (formal usted)

In this sentence, the subject is Mi profesor brasileño, so vive means lives.

Spanish often leaves out subject pronouns because the verb ending already gives information about the subject.

So instead of saying:

• Él vive aquí

Spanish can simply say:

• Vive aquí

In your sentence, the full subject Mi profesor brasileño is already stated, so there is no need for él.

Both can mean here, but aquí is the more common choice in many neutral examples and is very common in Spain.

• aquí = here
• acá = here, often with a slightly more directional or regional feel in some varieties

For a learner, aquí is the safest and most standard option in a sentence like this.

Normally, no. The natural order is:

• Mi profesor brasileño vive aquí

Putting brasileño before profesor is unusual and would sound marked or unnatural in most normal contexts. In Spanish, nationality adjectives almost always go after the noun.

You would change both the noun and the adjective to feminine:

• Mi profesora brasileña vive aquí.

Changes:

• profesor → profesora
• brasileño → brasileña

The possessive mi stays the same.

You would make the noun, adjective, and verb plural:

• Mis profesores brasileños viven aquí.
• Mis profesoras brasileñas viven aquí.

Changes:

• mi → mis
• profesor → profesores
• brasileño → brasileños
• vive → viven

Spanish requires agreement across the sentence.

It often is, especially in simple statements like this, because it sounds natural to put the location after the verb:

• Mi profesor brasileño vive aquí.

But Spanish word order is somewhat flexible. For emphasis, you could also say:

• Aquí vive mi profesor brasileño.

That version puts more focus on here.