O passeio foi divertido.

Passeio usually means an outing, a trip out, a stroll, or a ride, depending on context.

It is often used for something pleasant or leisurely, not usually a long, major trip. So it can refer to things like:

• a walk in the park
• a family outing
• a sightseeing trip
• a boat ride

So O passeio foi divertido is something like The outing was fun or The trip was enjoyable.

O is the masculine singular definite article, meaning the.

Portuguese uses definite articles more often than English does. Since passeio is a masculine singular noun, it takes o:

• o passeio = the outing
• o carro = the car
• o livro = the book

If the noun were feminine, it would use a:

• a viagem = the trip

Yes, passeio is masculine.

You can tell in this sentence because it uses:

• o passeio
• divertido (not divertida)

Many nouns ending in -o are masculine, though not all. Here, the article and adjective both confirm the gender.

Because divertido agrees with passeio, and passeio is masculine singular.

In Portuguese, adjectives usually agree in gender and number with the noun they describe.

So:

• o passeio foi divertido = masculine singular
• a viagem foi divertida = feminine singular
• os passeios foram divertidos = masculine plural
• as viagens foram divertidas = feminine plural

Foi means was in this sentence.

It is the 3rd person singular form of the verb ser in the preterite:

• eu fui
• você/ele/ela foi
• nós fomos
• eles/elas foram

So O passeio foi divertido literally means The outing was enjoyable/fun.

This is a very common question.

Foi is the preterite, which usually presents the event as a completed whole.
Era is the imperfect, which usually gives background, describes ongoing situations, or talks about repeated past states.

So:

• O passeio foi divertido.
  = The outing was fun.
  This sounds like a completed event being evaluated as a whole.

• O passeio era divertido.
  = The outing was fun / used to be fun / was fun at that point.
  This sounds more descriptive, contextual, or less like a simple finished-event summary.

In most normal contexts, foi divertido is the natural choice when you are talking about how an outing turned out.

Portuguese usually uses ser to describe the nature or overall characterization of an event:

• A festa foi ótima.
• O filme foi interessante.
• O passeio foi divertido.

This is not about a temporary physical state like being tired or being open. It is more like saying the outing was, overall, fun.

You might hear estar in different contexts, but foi divertido is the normal, natural way to say that an event was fun.

Not exactly, but it is often the best translation here.

Divertido usually means:

• fun
• enjoyable
• amusing

English fun is flexible and can act differently in sentences. Portuguese often uses divertido/divertida where English would use fun as an adjective-like word.

So:

• Foi divertido. = It was fun.
• Uma pessoa divertida = a fun/funny/amusing person

Depending on context, divertido can lean more toward enjoyable or amusing.

Yes. In Brazil, legal is very common in everyday speech and can mean:

• nice
• cool
• fun
• good

So:

• O passeio foi divertido. = The outing was fun/enjoyable.
• O passeio foi legal. = The outing was nice/cool/fun.

Divertido is a bit more specifically fun/enjoyable, while legal is broader and more casual.

Normally, no. In standard Portuguese, you would usually say O passeio foi divertido.

Leaving out the article here sounds unnatural in most contexts. Portuguese generally wants the article with a specific noun like this.

So use:

• O passeio foi divertido.

not usually:

• Passeio foi divertido.

In Brazilian Portuguese, passeio is roughly pronounced pah-SEY-oh, with the stress on sey.

A rough guide:

• pa = like pah
• ssei = like say
• o = a short oh

So the whole sentence sounds roughly like:

oo pah-SEY-oh foy jee-vehr-CHEE-doo

A few notes:

• foi sounds roughly like foy
• in many parts of Brazil, di in divertido sounds like jee

This is only an approximation, but it can help at the beginner stage.