Telefonul este personal.

Because -ul is the Romanian definite article, attached to the end of the noun.

• telefon = a phone / phone
• telefonul = the phone

Unlike English, Romanian usually puts the definite article at the end of the noun instead of as a separate word before it.

Este is the 3rd person singular form of a fi = to be.

So:

• eu sunt = I am
• tu ești = you are
• el/ea este = he/she/it is

In normal Romanian, este is often shortened to e in everyday speech:

• Telefonul este personal.
• Telefonul e personal.

Both are correct. Este sounds a bit more formal or careful.

Romanian often does not use a subject pronoun when it is already clear from the context or from the verb.

English needs It is personal.
Romanian can simply say Este personal or, with the noun included, Telefonul este personal.

Since telefonul is already the subject, no extra pronoun is needed.

Personal is an adjective. It describes the noun telefonul.

So the structure is:

• telefonul = the phone
• este = is
• personal = personal

Romanian adjectives usually agree with the noun in gender and number, but some adjectives, including personal in this form, may look very similar to the English equivalent.

Yes, adjectives can change depending on gender and number.

For personal, some common forms are:

• masculine singular: personal
• feminine singular: personală
• masculine plural: personali
• feminine plural: personale

So:

• telefonul este personal = the phone is personal
• informația este personală = the information is personal

In your sentence, telefonul is masculine singular, so personal is the correct form.

You usually learn the gender together with the noun. Telefon is a masculine noun in Romanian.

That matters because:

• the definite article changes depending on gender/number
• adjectives change form to agree with the noun

For a masculine singular noun like telefon, the definite form is telefonul.

This is the most neutral and standard order:

subject + verb + adjective

So:

• Telefonul = subject
• este = verb
• personal = adjective/complement

Romanian word order is somewhat flexible, but this version is the most natural in ordinary statements. A different order may sound emphatic or poetic, but learners should stick with:

Telefonul este personal.

A simple learner-friendly pronunciation is:

te-le-FO-nul

The stress is on fo.

A rough English approximation would be: teh-leh-FOH-nool

A few notes:

• e is usually like e in bet, not like English ee
• o is a clear o
• u is like oo in food, but shorter

Yes. Romanian telefon is a cognate of English telephone. Many Romanian words of international origin look familiar to English speakers.

Here:

• English: telephone / phone
• Romanian: telefon

Then Romanian adds the definite article:

• telefonul = the phone

Yes, depending on context. Romanian personal can correspond to English personal, and in some situations the idea may overlap with private.

For example, if someone says Telefonul este personal, it often means the phone belongs to one person or is for private use, not shared or public.

So the exact English wording can vary a little depending on context, even though the Romanian sentence stays the same.

Yes.

• un telefon = a phone
• telefonul = the phone

So:

• Un telefon este personal = A phone is personal or One phone is personal
• Telefonul este personal = The phone is personal

The sentence you have uses the definite form, referring to a specific phone.

Yes, it is pronounced. The ending -ul is part of the definite article and should be heard.

So it is telefonul, not just telefonu.

Learners sometimes weaken or drop final consonants because English often does this differently, but in Romanian the l should be pronounced clearly.