После его слов в комнате появилась неловкость.

Because после requires the genitive case in Russian.

• после = after
• его слов = his words

Here, слова is in the genitive plural form слов.

So:

• после его слов = after his words / after what he said

This is a fixed grammar pattern: после + genitive.

Because after после, the noun must be in the genitive case, and слова changes to слов.

The base form is:

• слово = word

Its plural nominative is:

• слова = words

But in the genitive plural, it becomes:

• слов

So:

• его слова = his words (subject or dictionary-type plural form)
• после его слов = after his words (genitive plural after после)

Его means his here.

For possessive meaning, его is convenient because it does not change form across cases, genders, or numbers in modern Russian.

So you can get:

• его слово = his word
• его слова = his words
• после его слов = after his words

Even though слов changes case, его stays the same.

Also, его can mean:

• him as an object
• his as a possessive

In this sentence, the meaning is clearly possessive: his words.

Because в комнате means in the room, and after в meaning location, Russian usually uses the prepositional case.

• комната = room
• в комнате = in the room

This answers the question where?

Compare:

• в комнату = into the room → motion/destination, accusative
• в комнате = in the room → location, prepositional

Here there is no movement into the room. The sentence is describing what happened in the room.

Because it agrees with the grammatical subject неловкость, which is a feminine noun.

The subject is:

• неловкость = awkwardness / embarrassment / tension

Since it is feminine singular, the past-tense verb is feminine singular too:

• появился = masculine
• появилась = feminine
• появилось = neuter
• появились = plural

So:

• появилась неловкость = awkwardness appeared

Even though English does not usually say awkwardness appeared, Russian often uses this structure naturally.

The subject is неловкость.

A learner might first think в комнате or после его слов is the subject because they come earlier, but they are just phrases giving context:

• После его слов = after his words
• в комнате = in the room
• появилась неловкость = awkwardness appeared

So the core sentence is:

• Неловкость появилась = Awkwardness appeared

The verb появилась matches неловкость, which helps you identify the subject.

Russian word order is flexible, and this version sounds natural because it presents the sentence in a smooth, contextual way:

• После его слов → sets the time/context first
• в комнате → then the setting
• появилась неловкость → then the new event/result

This structure often sounds more natural in narrative Russian because the speaker starts with background information and puts the new or important development later.

Different orders are possible, but they can feel different in emphasis:

• После его слов в комнате появилась неловкость
  Neutral, natural storytelling order.

• Неловкость появилась в комнате после его слов
  More emphasis on неловкость, slightly less natural in many contexts.

Russian often places the newly introduced thing later in the sentence.

In this sentence, неловкость means something like:

• awkwardness
• embarrassment
• social discomfort
• an awkward atmosphere

It does not literally mean physical clumsiness here, even though in other contexts the word can relate to awkwardness more generally.

So в комнате появилась неловкость suggests that after he spoke, the atmosphere in the room became uncomfortable or tense in a socially awkward way.

A very natural English translation might be:

• After his words, an awkward silence filled the room.
• After he said that, the room became awkward.
• After his words, an awkwardness settled over the room.

The exact English wording depends on style.

Russian has no articles like a, an, or the.

So неловкость can mean:

• awkwardness
• an awkwardness
• the awkwardness

The exact sense comes from context.

In this sentence, English often wants an awkwardness or a more idiomatic phrasing like an awkward silence or awkwardness. Russian simply uses the noun without any article.

Yes, появилась literally means appeared, but in Russian this is a very natural way to describe something coming into existence or becoming noticeable.

So появилась неловкость literally means:

• awkwardness appeared

But natural English often prefers something less literal, such as:

• there was an awkward moment
• an awkwardness arose
• the room became awkward
• a feeling of awkwardness appeared in the room
• an awkward silence fell over the room

So the Russian is normal; the English translation may need to be freer to sound natural.

They are similar, but not exactly the same.

• После его слов = after his words / after what he said
• После того, как он сказал это = after he said that

The second version is more explicit and clause-based. The first is shorter and more literary or compact.

После его слов focuses on the effect of his words themselves.
После того, как он сказал это focuses more on the action of saying.

Both can work, but the sentence you have is concise and stylistically elegant.

Yes, it could:

• После его слов появилась неловкость в комнате.

But this often sounds a bit less natural, because в комнате is part of the setting and fits well earlier in the sentence.

Russian often prefers to place setting information before introducing the new result:

• После его слов в комнате появилась неловкость.

That said, moving phrases around is possible if you want a different emphasis.

Yes. It sounds natural, especially in written Russian, narration, fiction, or more polished speech.

It has a slightly literary feel because of the noun неловкость and the verb появилась. In casual speech, a person might say something more direct, like:

• После его слов в комнате стало неловко.
  = After his words, it became awkward in the room.

• После его слов повисла неловкая пауза.
  = After his words, an awkward pause hung in the room.

So your sentence is natural, but somewhat more descriptive and narrative than everyday casual speech.