O baralho está na mesa.

Portuguese usually uses estar for location:

• O baralho está na mesa. = the deck is on the table.
• Lisboa é a capital de Portugal. = Lisbon is the capital of Portugal.

So here está is used because the sentence tells you where the deck is, not what it is by nature or identity.

Na is a contraction:

• em
  • a = na

So:

• na mesa = in/on/at the table, depending on context

Portuguese often contracts certain prepositions with articles. Here mesa is feminine singular, so it takes a, and em + a becomes na.

Related forms:

• no = em + o
• nos = em + os
• nas = em + as

This is a very common question. In Portuguese, em often covers meanings that English splits into in, on, and sometimes at, depending on context.

So na mesa is the normal way to say that something is on the table.

If you want to be more physically explicit, you can also say:

• sobre a mesa
• em cima da mesa

These also mean on top of the table, but na mesa is very natural in everyday Portuguese.

Portuguese uses definite articles more often than English does.

So o baralho literally means the deck (of cards). In many normal sentences, Portuguese prefers the article where English might sometimes omit it.

Here it refers to a specific deck, so o baralho sounds natural.

Baralho usually means a deck/pack of cards.

It can refer to:

• the whole deck of playing cards
• sometimes, by extension, card-playing in general

In this sentence, the most natural meaning is the deck of cards.

Because Portuguese nouns have grammatical gender.

• baralho is masculine, so it takes o
• mesa is feminine, so it takes a

So:

• o baralho
• a mesa

This is grammatical gender, not biological sex. You simply learn each noun with its article.

Yes, very closely in this sentence.

Portuguese structure:

• O baralho = subject
• está = verb
• na mesa = location

So it follows the same basic order as English:

• The deck is on the table.

That makes this sentence quite straightforward for an English speaker.

The accent mark in está shows the stressed syllable and helps distinguish the form.

• está = is
• esta = this (feminine)

So the accent is important both for pronunciation and meaning.

In European Portuguese, está is pronounced roughly like shtá, especially in natural speech.

A more careful approximation is:

• está → esh-TAH / shtah

The first vowel is often very reduced in Portugal, which is why learners may hear something close to shtá.

Yes. That is correct.

• O baralho está na mesa = the normal everyday way
• O baralho está sobre a mesa = more explicitly on top of the table
• O baralho está em cima da mesa = also explicitly on top of the table

All are possible, but na mesa is often the most natural basic choice.

Yes. Mesa is singular because the sentence refers to one table.

If it were plural, you would say:

• As mesas = the tables
• O baralho está nas mesas = the deck is on the tables

Notice how nas is the contraction of em + as.

By itself, baralho normally just means deck of cards.

However, in European Portuguese there is a mild minced oath caraças/baralho in some expressions, but that is separate from the literal noun. In this sentence, there is no ambiguity at all: it simply means deck of cards.