După ploaie, cerul rămâne senin.

After the preposition după (after), Romanian often uses a bare noun when speaking in a general or natural way: după ploaie = after rain / after the rain.

Both forms can exist, but they feel a bit different:

• după ploaie = after rain, after the rain, in a general sense
• după ploaia de ieri = after yesterday’s rain, referring to a specific rain

So in După ploaie, cerul rămâne senin, the bare noun sounds natural and idiomatic.

Because -ul at the end is the definite article in Romanian.

• cer = sky
• cerul = the sky

Romanian usually puts the definite article at the end of the noun, unlike English, which uses a separate word:

• English: the sky
• Romanian: cerul

This is one of the most important differences between Romanian and English.

Rămâne means remains or stays.

It comes from the verb a rămâne = to remain / to stay.

In this sentence:

• cerul rămâne senin = the sky remains clear

It is in the present tense, 3rd person singular, because the subject is cerul (the sky).

A few forms of a rămâne:

• eu rămân = I remain
• tu rămâi = you remain
• el/ea rămâne = he/she/it remains
• noi rămânem = we remain
• voi rămâneți = you all remain
• ei/ele rămân = they remain

Senin usually means clear, especially about the sky or weather.

So:

• cer senin = clear sky
• Cerul este senin = The sky is clear

It can also have a more figurative meaning, like calm, serene, or peaceful, depending on context. But in this sentence it clearly refers to the weather.

Because senin must agree with cerul.

• cerul is masculine singular
• so the adjective is also masculine singular: senin

Compare:

• cerul senin = the clear sky
• vremea senină = the clear weather

So the adjective changes depending on the noun it describes.

The comma separates the introductory phrase După ploaie from the main clause.

• După ploaie = introductory time expression
• cerul rămâne senin = main statement

In English, this is similar to:

• After the rain, the sky remains clear.

The comma helps readability. In short Romanian sentences, you may sometimes see punctuation used a bit flexibly, but the comma here is perfectly natural.

The given word order is the most neutral and natural:

• După ploaie, cerul rămâne senin.

But Romanian word order is fairly flexible, especially for emphasis. For example:

• Cerul rămâne senin după ploaie.
• Senin rămâne cerul după ploaie. (more poetic or marked)

The original version is best for normal speech and writing because it presents the time setting first, then the main idea.

Not always, but very often după is followed by a noun without major visible case changes, because modern Romanian has a reduced case system in many everyday structures.

Examples:

• după masă = after lunch / after the meal
• după școală = after school
• după ploaie = after rain

Sometimes you may also see a definite or more specific form:

• după film = after the movie / after a movie
• după filmul acesta = after this movie

So the exact form depends on whether the noun is being used generally or specifically.

A rough pronunciation guide:

• rămâne ≈ ruh-MUH-nuh
• senin ≈ seh-NEEN

A few helpful notes:

• ă is a short central vowel, like a relaxed uh
• â is a deeper central vowel, somewhat harder for English speakers; it does not have a perfect English equivalent
• The stress in rămâne falls on the second syllable: ră-MÂ-ne
• The stress in senin falls on the second syllable: se-NIN

Yes, but the meaning changes slightly.

• Cerul este senin. = The sky is clear.
• Cerul rămâne senin. = The sky remains clear.

Using rămâne emphasizes continuity: the sky stays clear, or continues to be clear after the rain.

So rămâne adds a subtle sense of change or persistence that este does not.

Yes. It sounds natural and correct.

It has a slightly descriptive or literary feel because of rămâne senin, but it is still perfectly normal Romanian. It could appear in:

• conversation
• writing
• weather description
• literature

A more everyday alternative might be:

• După ploaie, cerul este senin.
• După ploaie, cerul se înseninează. = After the rain, the sky clears up.

But the original sentence is absolutely good Romanian.