Disse adeus antes da ronda.

Disse is the pretérito perfeito simples form of dizer and means said in a completed past action.

So Disse adeus means that the action of saying goodbye happened once and is viewed as finished.

Compare:

• disse = said, did say
• dizia = was saying / used to say

In this sentence, the completed action is what matters, so disse is the natural choice.

On its own, disse can mean:

• I said
• he said
• she said
• you said (formal você)

Portuguese often leaves out the subject pronoun when it is understood from context. So without more context, Disse adeus antes da ronda is ambiguous.

For example:

• Eu disse adeus antes da ronda. = I said goodbye before the round/patrol.
• Ela disse adeus antes da ronda. = She said goodbye before the round/patrol.

Portuguese is a pro-drop language, which means subject pronouns are often omitted when they are not necessary.

In English, you usually must say I said or he said. In Portuguese, just disse is often enough if the context makes the subject clear.

That is very normal and natural in both spoken and written Portuguese.

Because dizer adeus is a fixed expression meaning to say goodbye.

Here, adeus functions like the farewell itself, not like a countable noun that needs an article.

So:

• disse adeus = said goodbye

You will often see similar patterns:

• dar um abraço = give a hug
• dizer olá = say hello
• dizer adeus = say goodbye

With adeus, no article is normally used in this expression.

Antes de means before.

When de is followed by the feminine singular definite article a, they contract:

• de + a = da

So:

• antes de a ronda → antes da ronda

This is standard Portuguese contraction.

Because ronda here is being treated as a specific noun with the definite article a.

So the structure is:

• antes de + a ronda
• which becomes
• antes da ronda

This usually suggests before the round / before the patrol / before the inspection round, not just before any round in general.

Ronda can have a few related meanings depending on context. In European Portuguese, common possibilities are:

• a patrol
• a round made by a guard, nurse, police officer, etc.
• an inspection round

So antes da ronda could mean something like:

• before the patrol
• before the round
• before the inspection round

The exact meaning depends on the situation.

Yes, adeus is very common and completely natural in Portugal.

It usually corresponds to goodbye. Depending on tone and context, it can sometimes sound a bit more definite or final than casual alternatives.

Other farewells include:

• tchau = casual bye
• até logo = see you later
• até amanhã = see you tomorrow

But dizer adeus is a very standard expression.

Yes. Portuguese allows some flexibility in word order.

For example, these are both natural:

• Disse adeus antes da ronda.
• Antes da ronda, disse adeus.

The second version puts more focus on the time expression before the round/patrol.

The basic meaning stays the same.

You would usually add an indirect object pronoun:

• Disse-lhe adeus antes da ronda. = He/She/I said goodbye to him/her before the round.

Here:

• lhe = to him / to her / to you (formal)

Other examples:

• Disse-lhes adeus. = said goodbye to them
• Eu disse-lhe adeus. = I said goodbye to him/her

So dizer adeus can appear either on its own or with the person receiving the goodbye.

In European Portuguese, disse is roughly pronounced DEE-suh, but with a reduced final vowel, so the last sound is weaker than in English.

A rough guide:

• disse ≈ DEE-suh
• adeus ≈ ah-DEH-oosh
• ronda ≈ RON-duh

These are only approximations. European Portuguese often reduces unstressed vowels quite strongly, so the real pronunciation is less open and more compact than an English speaker may expect.