Todo quedó entendido.

Here quedó comes from quedar. In this sentence, quedar + past participle often expresses the result of a situation: how something ended up after some discussion, explanation, or process.

So Todo quedó entendido means something like:

• Everything ended up understood
• Everything was understood in the end
• Everything was made clear

It does not literally mean everything stayed understood in a natural English sense, even though quedar can sometimes mean to remain or to stay.

Entendido is the past participle of entender (to understand).

In this structure, it works like a result adjective or participle: it describes the final state of todo.

So:

• entender = to understand
• entendido = understood

In Todo quedó entendido, entendido tells you the final result: everything was understood.

Because todo here is grammatically singular.

Even though todo refers to everything, which may include many ideas or points, Spanish treats todo as a singular pronoun in this kind of sentence. That is why both the verb and the participle are singular:

• Todo quedó entendido

not:

• Todo quedaron entendidos

Also, todo is grammatically masculine in this neutral, general sense, so entendido is masculine singular.

Quedó is the preterite of quedar, and the preterite is used because the sentence presents the understanding as a completed result.

It suggests that at some point, after explanation or discussion, the matter was settled:

• first there may have been doubt or explanation
• then the result was reached
• now everything was understood

If you changed the tense, the meaning would shift:

• Todo queda entendido = everything is understood / everything stands understood
• Todo quedaba entendido = everything was becoming understood / everything was understood in that context
• Todo ha quedado entendido = everything has ended up understood

Not a standard passive in the same way as Todo fue entendido.

Todo quedó entendido is better thought of as a resultative or passive-like structure. It focuses on the final state, not on who did the understanding.

Compare:

• Todo fue entendido = everything was understood
  This is closer to a regular passive.
• Todo quedó entendido = everything ended up understood / everything was left clear
  This emphasizes the outcome.

In everyday Spanish, especially in this kind of context, quedar + participle often sounds more natural than a formal passive with ser.

The main difference is focus.

• Todo fue entendido focuses more on the action itself: everything was understood.
• Todo quedó entendido focuses more on the result after some explanation, conversation, or clarification: everything ended up clear/understood.

In many real situations, quedó entendido sounds more idiomatic and less stiff than fue entendido.

Yes, you could, but it is not exactly the same.

• Todo se entendió = everything was understood / everything got understood
• Todo quedó entendido = everything ended up understood / everything was left clear

Se entendió sounds more like the understanding happened. Quedó entendido sounds more like the final state was achieved.

The second one can feel slightly more formal or more focused on the outcome of an explanation, agreement, or meeting.

Yes, it is natural, especially in contexts where someone wants to confirm that all the points have been made clear.

It can sound a bit formal or matter-of-fact, depending on context, but it is perfectly normal. You might hear similar expressions such as:

• ¿Ha quedado todo entendido?
• Quedó todo claro
• Todo quedó aclarado

It is especially common in discussions, instructions, meetings, or situations where clarity matters.

Because todo is the subject of the sentence: everything.

Spanish word order is flexible, but starting with todo is the most neutral and straightforward option here:

• Todo quedó entendido

You could also hear:

• Quedó todo entendido

That version is also possible, but it may sound a little more marked or contextual depending on tone and situation.

Often, yes, or at least very close.

• Todo quedó claro = everything became clear / everything was clear in the end
• Todo quedó entendido = everything was understood in the end

The difference is small but real:

• claro focuses on clarity
• entendido focuses on understanding

In many situations, Todo quedó claro may sound a bit more common in everyday conversation.

By itself, it mainly means understanding, not necessarily agreement.

However, depending on context, it can sometimes suggest that all points were not only understood but also accepted as settled. For example, after giving instructions or clarifying rules, saying Todo quedó entendido can imply that there are no doubts left.

So the exact nuance depends on the situation:

• in a neutral explanation: everything was understood
• in a formal or practical context: everything was understood and settled

Yes. It can sound somewhat formal, concise, or detached, especially because it does not mention who understood.

That is often the point: the sentence focuses on the outcome rather than the people involved.

If you wanted something more direct or conversational, you might say:

• Todos lo entendieron = everyone understood it
• Se entendió todo = everything was understood
• Quedó todo claro = everything was clear in the end

So Todo quedó entendido is natural, but it has a slightly more official or summary-like feel than some alternatives.