A mente está cansada.

In Portuguese, singular countable nouns normally use an article more often than in English. So a mente is the natural way to say the mind.

You can sometimes see mente without an article in more abstract or stylistic contexts, but in a basic sentence like this, a mente sounds most normal.

Because mente is a feminine noun in Portuguese, so it takes the feminine article a and feminine adjectives.

That is why the sentence has:

• a mente
• está cansada

not o mente or cansado.

Portuguese has two main verbs for to be: ser and estar.

Here, está is used because cansada describes a temporary state or condition: the mind is tired right now.

• está cansada = is tired, is in a tired state
• é cansada would sound odd here, as if tiredness were a permanent or defining characteristic

So estar is the correct choice.

Adjectives in Portuguese usually agree with the noun they describe in gender and number.

Since mente is feminine singular, the adjective must also be feminine singular:

• masculine singular: cansado
• feminine singular: cansada
• masculine plural: cansados
• feminine plural: cansadas

So:

• A mente está cansada. = correct

The accent marks the stressed syllable and is also part of the correct spelling.

• está = is
• the stress falls on the final syllable: es-TÁ

In writing, the accent is required.

Yes, mente is the standard word for mind, especially in a psychological, intellectual, or abstract sense.

Examples of how it can feel:

• mente = mind, intellect, mental sphere
• cabeça = head, and sometimes informally mind/headspace

So A mente está cansada sounds a bit reflective or psychological. In casual speech, Brazilians might also express similar ideas in other ways, depending on context.

It is understandable and correct, but it can sound a little literary, reflective, or dramatic depending on context.

In everyday conversation, people might more often say things like:

• Estou mentalmente cansado/cansada. = I’m mentally tired.
• Minha cabeça está cansada. = My head/mind is tired.
• Estou esgotado/esgotada mentalmente. = I’m mentally exhausted.

So the sentence is good Portuguese, but not always the most casual everyday phrasing.

No. The adjective agrees with mente, not with the speaker.

Since mente is feminine, it must be:

• A mente está cansada.

Even if a man is speaking, mente is still feminine.

If you want the adjective to agree with the speaker instead, you would change the structure:

• Estou cansado. = I am tired. (male speaker)
• Estou cansada. = I am tired. (female speaker)

Normally, no. That sounds unnatural in standard Portuguese.

You would usually say:

• A mente está cansada.

Leaving out the article in this sentence is not the normal pattern.

The standard word order is:

• A mente (subject)
• está (verb)
• cansada (adjective)

So A mente está cansada is the neutral, natural order.

Other orders are possible in special contexts, poetry, or emphasis, but they are not what a learner should start with.

A simple approximate pronunciation is:

ah MEN-che es-TAh kan-ZA-dah

A few notes:

• mente often sounds roughly like MEN-che in Brazilian Portuguese
• está is stressed on the last syllable: es-TÁ
• cansada is stressed on sa: can-SA-da

Pronunciation varies by region, but this approximation is a good start.

It usually refers to the abstract mind, mental state, or thinking capacity.

Depending on context, it could mean something like:

• the mind is fatigued
• mental focus is exhausted
• someone is mentally tired

So even though the grammatical subject is the mind, the sentence can absolutely describe a person’s mental tiredness.

You would make everything plural:

• As mentes estão cansadas. = The minds are tired.

Changes:

• a → as
• mente → mentes
• está → estão
• cansada → cansadas

This shows how articles, verbs, and adjectives change for number in Portuguese.