Actorul este convingător.

Because Romanian usually puts the definite article at the end of the noun.

• actor = an actor
• actorul = the actor

So -ul is the masculine singular definite article here. This is one of the first big differences English speakers notice in Romanian.

-ul means the in this sentence.

So:

• actor = actor
• actorul = the actor

Romanian often uses a suffix article instead of a separate word like English the.

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

So the structure is:

• Actorul = the actor
• este = is
• convingător = convincing / persuasive

Romanian normally keeps the verb to be in sentences like this, unlike some languages where it can be omitted.

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

So both are correct:

• Actorul este convingător.
• Actorul e convingător.

Este sounds a bit more neutral or careful; e is very common in normal speech.

Because it agrees with actorul, which is masculine singular.

Romanian adjectives change form to match the noun’s:

• gender
• number
• sometimes definiteness context

Here:

• actorul = masculine singular
• so the adjective is convingător

Compare:

• actrița este convingătoare = the actress is convincing
• actorii sunt convingători = the actors are convincing
• actrițele sunt convingătoare = the actresses are convincing

It can mean either, depending on context.

In a sentence like Actorul este convingător, English might translate it as:

• The actor is convincing
• sometimes The actor is persuasive

For an actor, convincing is often the most natural English choice, because it suggests the performance feels believable.

The normal, neutral order is:

Actorul este convingător.

Romanian word order is fairly flexible, but changing it usually changes the emphasis.

For example:

• Actorul este convingător. = neutral
• Convingător este actorul. = marked, more literary or contrastive
• Este convingător actorul. = possible in context, but less neutral

So for a learner, the original order is the safest and most natural one.

Because the subject is already expressed by the noun actorul.

Romanian does use subject pronouns, but it does not need them when the subject is already clear.

So:

• Actorul este convingător. = The actor is convincing.
• El este convingător. = He is convincing.

You would use el only if you specifically want he, not the actor, or if you want extra emphasis or contrast.

Normally, no. In a standard sentence like this, Romanian needs the verb.

So:

• Actorul este convingător. = correct
• Actorul convingător. = not a normal complete sentence with this meaning

Without este, it would sound incomplete or like part of a noun phrase rather than a full statement.

A rough pronunciation is:

con-vin-gă-TOR

A few helpful points:

• ă is a short central vowel, similar to the a in English sofa, but not exactly the same
• the stress is on the last syllable: -tor
• Actorul is roughly ac-TOR-ul
• este is roughly ES-te

So the whole sentence is approximately:

ac-TOR-ul ES-te con-vin-gă-TOR

Because in this sentence the noun is definite, and the adjective is simply describing it after the verb to be.

So Romanian says:

• Actorul este convingător.

The definiteness is already carried by actorul. The adjective does not need its own article here.

This is different from structures where an adjective comes directly before or after a noun inside a noun phrase, where Romanian can show definiteness differently.

Here are the main matching forms:

• Actorul este convingător. = masculine singular
• Actrița este convingătoare. = feminine singular
• Actorii sunt convingători. = masculine plural
• Actrițele sunt convingătoare. = feminine plural

This is a good example of adjective agreement in Romanian:

• convingător = masculine singular
• convingătoare = feminine singular / feminine plural
• convingători = masculine plural

Yes. That would mean The actor is very convincing.

You can easily add adverbs before the adjective:

• Actorul este foarte convingător. = very convincing
• Actorul este destul de convingător. = fairly / quite convincing
• Actorul nu este convingător. = not convincing

This shows that convingător is functioning as a normal predicate adjective after este.