После совещания мне не до разговоров: я устал и хочу отдохнуть.

Because после always takes the genitive in Russian.

So:

• совещание = meeting / briefing / conference
• после совещания = after the meeting

This is a very common pattern:

• после урока = after the lesson
• после работы = after work
• после обеда = after lunch

Not exactly.

Совещание usually means a work-related meeting, especially one where people discuss issues, plans, or decisions. It often sounds more formal or businesslike.

Встреча is broader and can mean:

• a meeting in general
• an appointment
• even meeting someone socially

So in this sentence, совещание suggests something like a staff meeting, briefing, or work discussion.

Because the expression мне не до... is a fixed Russian pattern, and it uses the dative case.

• я = I
• мне = to me / for me

Literally, the structure is something like:

• мне не до разговоров = it is not the time / state / mood for conversations for me

In natural English, this usually becomes:

• I’m not in the mood for talking
• I don’t feel like talking
• I’m not up for conversation

So мне is required by this idiomatic expression.

Не до + genitive is a very common Russian idiom. It means:

• not in the mood for
• not up to
• not the time for
• unable to deal with because of one’s state or situation

So:

• мне не до разговоров = I’m not up for talking / I’m not in the mood for conversation

It often suggests that a person is too tired, worried, busy, upset, or preoccupied for something.

More examples:

• Мне сейчас не до шуток. = I’m not in the mood for jokes right now.
• Ему было не до сна. = He wasn’t in the mood/condition for sleep.
• Нам не до отдыха. = We have no time/energy for rest.

Because не до requires the genitive case.

The base form is:

• разговоры = conversations / talks

But after не до, it becomes genitive plural:

• разговоров

So:

• не до разговоров = not up for conversations / not in the mood for talking

This is grammatically required by the expression.

Yes, singular is possible in some contexts, but the plural sounds more natural here.

• не до разговоров = not up for talking / not up for conversations in general
• не до разговора = not up for a particular conversation

So the plural gives a more general idea: the speaker does not want conversation at all.

English often uses a singular idea like talking, but Russian commonly uses the plural noun in expressions like this.

Yes, but it would mean something slightly different.

• Я не хочу разговаривать. = I don’t want to talk.
• Мне не до разговоров. = I’m not up for talking / I’m in no state for conversation.

The second version sounds more idiomatic and often stronger in context. It suggests the reason is the speaker’s condition: tiredness, stress, distraction, etc.

In this sentence, мне не до разговоров fits very well because the next part explains why:

• я устал и хочу отдохнуть

The colon introduces an explanation.

The first part says:

• После совещания мне не до разговоров = After the meeting, I’m not up for talking

The second part explains why:

• я устал и хочу отдохнуть = I’m tired and want to rest

So the colon works like:

• because
• here’s why
• namely

A dash or even a full stop might also be possible in some contexts, but the colon is very natural when the second part clearly explains the first.

Because устал is the normal way to say I am tired in Russian in this kind of situation.

Grammatically, устал is the past tense form of the verb устать = to get tired / become tired. But in modern Russian, it very often functions like English am tired.

So:

• я устал = I’m tired (said by a man)
• я устала = I’m tired (said by a woman)

By contrast, усталый is an adjective meaning tired or weary, but it is used differently:

• я усталый sounds less natural in this context
• усталый человек = a tired person
• усталый взгляд = a tired look

So for I’m tired, Russian usually prefers я устал / я устала.

Russian often omits a repeated subject when it is already clear from context.

The full version could be:

• После совещания мне не до разговоров: я устал и я хочу отдохнуть.

But repeating я again before хочу would sound unnecessary. And once я appears before устал, it naturally applies to хочу too.

You could even hear very compact speech where Russian drops a subject if it is obvious from the situation, but here the sentence already makes everything clear.

Because отдохнуть is the perfective infinitive, and here it means to get some rest, to rest for a while, or to become rested.

• хочу отдохнуть = I want to rest / I want to get some rest

This focuses on the result or completion of the rest.

By contrast:

• отдыхать is imperfective
• it focuses more on the process or repeated activity of resting

In this sentence, after a tiring meeting, the speaker wants a complete, practical result: some rest. So отдохнуть is the natural choice.

Its basic meaning is time: after the meeting.

But in the full sentence, it also strongly suggests the reason behind the speaker’s state. The idea is:

• after the meeting, I’m not up for talking, because I’m tired and want to rest

So grammatically после совещания is a time phrase, but in context it also implies that the meeting has left the speaker drained.

Not necessarily. It is direct, but it does not have to be rude.

Its tone depends on context and intonation:

• neutral explanation: I’m really not up for talking right now
• tired or stressed: I just can’t deal with conversation now
• sharp or irritated: I’m not in the mood for talking

In this sentence, because it is followed by я устал и хочу отдохнуть, it sounds more like a reasonable explanation than rudeness.