Потоотделение стало сильнее.

Потоотделение means sweating, perspiration, or more literally the secretion of sweat.

It is a compound noun:

• пот = sweat
• connecting -о-
• отделение = separation / secretion / discharge

So the whole word is fairly technical or medical-sounding. In everyday speech, Russians often use a verb instead, such as потеть = to sweat.

Grammatically, потоотделение is:

• neuter
• singular
• here in the nominative case because it is the subject of the sentence

Because Russian past tense agrees with the subject in gender and number.

The subject is потоотделение, which is:

• neuter
• singular

So the past tense of стать becomes:

• стал for masculine
• стала for feminine
• стало for neuter
• стали for plural

That is why the sentence has стало.

Стать means to become, so it shows a change of state.

So:

• Потоотделение стало сильнее = the sweating became stronger / increased

If you used быть, you would be describing a state rather than a change, and it would not fit this meaning as well.

This is a very common pattern in Russian:

• стать лучше = to become better
• стать хуже = to become worse
• стать больше = to become bigger / greater

Сильнее is the comparative form of сильный = strong.

So:

• сильный = strong
• сильнее = stronger

In this sentence, it means stronger or more intense.

Depending on context, English may translate it more naturally as:

• became stronger
• increased
• got more intense

Because Russian comparative forms like сильнее are generally unchangeable.

Unlike full adjectives, they do not agree in:

• gender
• number
• case

So even though потоотделение is neuter singular, the comparative still stays сильнее.

Compare:

• сильный пот = strong sweat
• потоотделение стало сильнее = sweating became stronger

In the second sentence, сильнее is a comparative predicate, so it does not inflect.

Yes. A sentence like this usually implies comparison with an earlier state, even if Russian does not say it explicitly.

So Потоотделение стало сильнее naturally means:

• sweating became stronger than it was before

Russian often leaves that comparison unstated when it is obvious from context.

If you wanted to say it explicitly, you could add something like:

• чем раньше = than before
• чем было до этого = than it was before

But in most cases, that is unnecessary.

Because сильным and сильнее mean different things here.

• стало сильным = became strong
• стало сильнее = became stronger

The first one gives an absolute quality: it became strong. The second one gives a comparison: it increased relative to an earlier state.

Also, with стать + adjective, Russian normally uses the instrumental case:

• стало сильным

But this sentence uses a comparative, not a normal adjective:

• стало сильнее

Yes, you could. It is grammatically correct.

• Потоотделение стало сильнее
• Потоотделение стало более сильным

Both mean roughly the same thing, but there is a difference in style:

• сильнее is shorter and more natural in many contexts
• более сильным sounds more formal, heavier, and less direct

In many cases, Russians would prefer the simpler comparative сильнее.

There is also another very natural option:

• Потоотделение усилилось = sweating intensified / increased

That version is especially common in medical or formal writing.

Yes, but it sounds somewhat formal, clinical, or medical because of the noun потоотделение.

In everyday conversation, people are more likely to use a verb, for example:

• Я стал сильнее потеть = I started sweating more
• Он стал больше потеть = He started sweating more

So:

• Потоотделение стало сильнее sounds natural in a medical, descriptive, or written context
• a verb-based version often sounds more conversational

The word order here is neutral and straightforward:

• Потоотделение = subject
• стало = verb
• сильнее = predicate comparative

So this is the most neutral way to present the information.

You can change the word order, but that changes emphasis:

• Сильнее стало потоотделение = puts more focus on stronger
• Стало сильнее потоотделение = also possible, often more contextual or stylistic

For a learner, the original order is the safest and most standard.

The stress is:

• потоотделе́ние
• ста́ло
• сильне́е

A rough pronunciation guide:

• потоотделе́ние ≈ pa-ta-at-dye-LYE-ni-ye
• ста́ло ≈ STA-la
• сильне́е ≈ seel-NYE-ye

One thing learners often notice is the sequence оо in потоотделение. That happens because the word is built from parts, and both vowels stay in the spelling. In normal speech, unstressed о is reduced, but the spelling remains потоотделение.