Ceaiul este cald.

Because -ul is the definite article in Romanian.

• ceai = tea or some tea
• ceaiul = the tea

So Ceaiul este cald means The tea is warm/hot, not just Tea is warm/hot in a general sense.

Este means is. It is the 3rd person singular form of the verb a fi (to be).

So:

• ceaiul = the tea
• este = is
• cald = warm / hot

In normal standard Romanian, no—you usually need este in a sentence like this.

So:

• Ceaiul este cald. = correct standard Romanian

In casual speech, native speakers may sometimes drop words in certain contexts, but for learners, you should keep este here.

In Romanian, adjectives often come after the noun, especially in basic descriptive sentences.

So:

• ceaiul cald = the warm tea
• Ceaiul este cald = The tea is warm

This is different from English, where adjectives usually come before the noun: warm tea.

It can mean either warm or hot, depending on context.

For tea, cald usually means it is warm or hot as opposed to cold. Romanian does not always make the same distinction English does between warm and hot.

Because ceaiul is a singular masculine/neuter noun, and cald is the correct singular masculine/neuter form of the adjective.

Romanian adjectives change form depending on gender and number. For example:

• masculine/neuter singular: cald
• feminine singular: caldă
• plural: calzi / calde depending on gender

Since ceai is treated as masculine in the singular, cald is the right form.

Ceai is a neuter noun.

In Romanian, neuter nouns behave:

• like masculine in the singular
• like feminine in the plural

That is why in the singular you see:

• ceaiul este cald

But in the plural:

• ceaiurile sunt calde = the teas are warm

A rough pronunciation is:

CHAI-ool YES-teh kahld

A bit more carefully:

• Ceaiul sounds approximately like chai-ul, with ceai sounding like English chai
• este sounds like YES-te
• cald sounds like kahld

A more IPA-style approximation would be:

• Ceaiul este cald ≈ /ˈt͡ʃajul ˈjeste kald/

The definite article for many Romanian nouns is written as -ul, so:

• ceai
  • -ul → ceaiul

That creates a sequence pronounced roughly like chai-ul. The u is part of the article.

This is normal in Romanian spelling and grammar.

Yes. E is a very common short form of este in everyday Romanian.

So both are correct:

• Ceaiul este cald. = more full/formal
• Ceaiul e cald. = very common in speech

Not usually.

• Ceaiul este cald = The tea is warm/hot
• Un ceai este cald = A tea is warm/hot

The second one is grammatically possible, but it sounds less natural unless you mean a specific cup/serving of tea in contrast with something else.

In most normal situations, if you mean a particular tea that both speakers know about, ceaiul is the natural choice.

Yes, Romanian word order is somewhat flexible, but Ceaiul este cald is the most neutral and natural order.

Other orders may be possible for emphasis, but for learners it is best to use:

• subject + verb + adjective

So stick with:

• Ceaiul este cald.

You put nu before the verb:

• Ceaiul nu este cald. = The tea is not warm/hot.

In everyday speech:

• Ceaiul nu e cald.

A simple way is to keep the same word order and use question intonation:

• Ceaiul este cald? = Is the tea warm/hot?

In everyday speech:

• Ceaiul e cald?

Romanian often relies on intonation for yes/no questions.