Новые слова лучше запоминаются в контексте.

Because it agrees with слова, which is the subject of the sentence.

• новые = new (plural, nominative)
• слова = words (plural, nominative)

In Russian, adjectives must match the noun they describe in gender, number, and case. Since слова is plural nominative, новые must also be plural nominative.

Because слова is the grammatical subject of the sentence — it is the thing that gets remembered.

The structure is not someone remembers new words better in context, but more like:

• New words are remembered better in context
• or New words stick better in memory in context

That is why слова is in the nominative case.

Because слово is a neuter noun, and its nominative plural form is слова.

This is a very common pattern:

• слово → слова
• окно → окна
• место → места

So новые слова simply means new words.

Лучше means better. It is the comparative form of хорошо (well).

In this sentence, лучше modifies the verb запоминаются, so it means:

• are remembered better
• stick better
• are memorized more easily

It does not mean best. For best, Russian would use лучше всего or another construction depending on context.

The verb запоминаться is the reflexive form of запоминать.

Compare:

• запоминать что-то = to memorize / remember something
• запоминаться = to be memorized, to stick in memory, to be remembered

In this sentence, the reflexive form gives a kind of middle/passive-like meaning. Russian often uses -ся this way when English might use:

• are remembered
• stick in the memory
• are easy to remember

So Новые слова лучше запоминаются... is very natural Russian.

The dictionary form is запоминаться.

Запоминаются is:

• 3rd person plural
• present tense
• imperfective
• reflexive (-ся)

It matches the plural subject новые слова.

So:

• слово запоминается = a word is remembered / sticks
• слова запоминаются = words are remembered / stick

Because this sentence states a general truth or regular tendency, not a single completed event.

Imperfective is used for:

• habits
• repeated actions
• general statements
• ongoing processes

So запоминаются fits well for the idea:

• New words are generally remembered better in context

A perfective form would sound wrong here because the sentence is not about one specific moment of successfully memorizing something.

Because в here means in, and with this meaning of location, Russian uses the prepositional case.

• контекст = context
• в контексте = in context

So контексте is the prepositional singular form of контекст.

This is a very common pattern:

• в книге = in the book
• в городе = in the city
• в тексте = in the text
• в контексте = in context

Because Russian has no articles like a or the.

So в контексте can mean:

• in context
• in the context
• in a context

The exact nuance depends on the broader meaning, not on an article.

In this sentence, English usually translates it as in context.

It can suggest both, depending on how naturally you want to render it in English.

Literally, it is:

• are remembered better

But in natural English, people often say:

• are easier to remember
• stick better in context
• are learned better in context

So the Russian expression is slightly broader than a strict word-for-word translation.

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

The neutral version here is:

• Новые слова лучше запоминаются в контексте.

But you could also say:

• В контексте новые слова лучше запоминаются.

This puts more emphasis on в контексте (in context).

You might also hear other variations in speech, depending on what the speaker wants to stress. The meaning stays basically the same, but the focus changes.

With stress marks, it is:

• Но́вые слова́ лу́чше запомина́ются в конте́ксте.

A rough pronunciation guide:

• Но́вые = NO-vy-ye
• слова́ = sla-VA
• лу́чше = LOOCH-she
• запомина́ются = za-pa-mee-NA-yut-sa
• в конте́ксте = f kan-TEX-tye

A small pronunciation note: в often sounds more like f before a voiceless consonant, so в контексте is pronounced close to f kontekste.

Not with the same meaning.

• запоминаются focuses on being remembered / sticking in memory
• учатся usually means are learned/studied

So:

• Новые слова лучше запоминаются в контексте = New words are remembered better in context
• Новые слова лучше учатся в контексте sounds less natural and shifts the idea toward learning/studying

If you want to talk specifically about memory, запоминаются is the better choice.