Врач успокоил меня и сказал, что новый шрам, скорее всего, не останется.

Успокоил is the perfective past tense of успокоить, so it presents the action as a completed result: the doctor reassured me.

If you used успокаивал instead, it would be imperfective, which would suggest a process, repeated attempts, or background action, such as was trying to calm me down or used to calm me down.

So in this sentence, успокоил fits because the speaker is talking about one completed action.

Меня is the accusative case of я.

It is used because успокоить takes a direct object:

• успокоил кого? → меня

So Врач успокоил меня means The doctor reassured me.

In the past tense, Russian verbs agree with the subject in gender and number.

The subject is врач, which is grammatically masculine singular, so the verb is сказал.

Compare:

• врач сказал — a male doctor said
• врач сказала — a female doctor said

Even though врач is grammatically a masculine noun, Russian often uses сказала if the doctor is female.

Что is a conjunction meaning that.

It introduces the content of what was said:

• сказал, что... = said that...

So the sentence has two parts:

• Врач успокоил меня и сказал
• что новый шрам, скорее всего, не останется

This is a very common pattern in Russian reported speech.

Новый шрам is in the nominative case because it is the subject of the clause не останется.

You can ask:

• что не останется? → новый шрам

Also, новый agrees with шрам:

• masculine
• singular
• nominative

That is why you get новый шрам.

It looks similar to a present-tense form, but остаться is a perfective verb, and perfective verbs do not have a true present tense.

Forms like останется are actually future in meaning:

• останется = will remain / will be left

So:

• остаётся from оставаться = is remaining / remains
• останется from остаться = will remain

Here the doctor is talking about the future result, so останется is exactly right.

Because Russian usually prefers the simple future of a perfective verb when talking about a single future result.

• не останется = won’t remain / won’t be left
• не будет оставаться would sound much more awkward here and would suggest an ongoing process rather than a final result

The sentence is about the outcome after healing, not about a continuing action, so не останется is the natural choice.

Скорее всего is a very common expression meaning most likely or probably.

Literally, it comes from the idea of more likely than anything else, but learners should treat it as a fixed phrase.

It expresses probability:

• Он, скорее всего, придёт. — He will most likely come.
• Это, скорее всего, ошибка. — This is probably a mistake.

In your sentence, it softens the doctor’s statement: he is not giving a 100% guarantee.

Because here скорее всего functions as a parenthetical or introductory expression showing the speaker’s degree of certainty.

Russian often puts commas around such expressions:

• конечно
• наверное
• по-видимому
• скорее всего

So:

• новый шрам, скорее всего, не останется

The commas show that скорее всего is not a core part of the clause structure, but a comment on how certain the speaker is.

Yes. Russian word order is flexible, and скорее всего can often move.

For example:

• ...что новый шрам, скорее всего, не останется.
• ...что, скорее всего, новый шрам не останется.
• ...что новый шрам не останется, скорее всего. — less neutral

The version in your sentence sounds natural and balanced. Putting скорее всего after новый шрам is very common.

Yes, Russian word order is more flexible than English word order.

For example:

• Врач успокоил меня и сказал... — neutral
• Врач меня успокоил и сказал... — also natural
• Меня успокоил врач и сказал... — possible, but with different emphasis

The original version is the most neutral and standard way to say it.

Russian has no articles.

So врач can mean:

• a doctor
• the doctor

And новый шрам can mean:

• a new scar
• the new scar

Which meaning is intended depends on context. In this sentence, context tells us it is a specific doctor and a specific scar already being discussed.

Шрам means scar, but in real speech people may use it a bit loosely for a mark left by an injury, cut, or healing wound.

So новый шрам, скорее всего, не останется means that the mark probably will not remain as a lasting scar.

In other words, the doctor is saying the healing will likely leave no visible permanent scar.