Sesiunea de orientare începe dimineața.

Sesiunea is the noun with the definite article attached, so it means the session.

In Romanian, the definite article is usually added to the end of the noun, not written as a separate word like English the.

• sesiune = session
• sesiunea = the session

So Sesiunea de orientare means the orientation session.

De often means of or for, and here it links the two nouns together.

• sesiune de orientare = orientation session
• literally, something like session of orientation

This is a very common Romanian structure:

• curs de limba română = Romanian language course
• sală de sport = gym / sports hall
• centru de informare = information center

So de orientare describes what kind of session it is.

Because Romanian handles definiteness differently from English.

In Sesiunea de orientare:

• sesiunea is definite: the session
• orientare stays indefinite because it is part of the descriptive phrase after de

So Romanian naturally says:

• sesiunea de orientare

not usually:

• sesiunea de orientarea

That second version would sound wrong in this context.

Începe is the 3rd person singular present tense of the verb a începe, meaning to begin / to start.

Here it matches the subject sesiunea, which is singular:

• eu încep = I begin
• tu începi = you begin
• el/ea începe = he/she/it begins
• sesiunea începe = the session begins

So începe is used because the session is a singular subject.

Romanian often omits subject pronouns when they are not needed, because the verb ending usually already shows the person and number.

So instead of saying:

• Ea începe dimineața

Romanian normally just says:

• Sesiunea începe dimineața

And if the subject is already named, adding ea would usually be unnecessary unless you want emphasis or contrast.

Here dimineața means in the morning or during the morning.

This is a very common Romanian time expression. Even though it looks like the definite form of morning, it often functions adverbially, meaning in the morning.

Compare:

• dimineața = in the morning
• seara = in the evening
• noaptea = at night

So in this sentence, dimineața tells you when the session begins.

Romanian usually says simply dimineața for the general idea of in the morning.

So:

• începe dimineața = it begins in the morning

Using în dimineață is not the normal way to express this general time idea.

However, Romanian can use în această dimineață = this morning, where în is followed by a noun phrase.

So:

• dimineața = in the morning, mornings
• în această dimineață = this morning

Yes. In Romanian, just like in English, the present tense is often used for scheduled future events.

So Sesiunea de orientare începe dimineața can mean:

• it begins in the morning
• it is scheduled to begin in the morning

This is very natural for timetables, programs, classes, meetings, transport, and similar planned events.

Yes, Romanian word order is fairly flexible, although some orders sound more neutral than others.

The most neutral version here is:

• Sesiunea de orientare începe dimineața.

You could also say:

• Dimineața începe sesiunea de orientare.

But that version puts more emphasis on dimineața and may sound more literary, marked, or context-dependent.

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

These are important Romanian sounds:

• ă as in sesiunea, dimineața: a short neutral vowel, like the a in English sofa
• î as in începe: a close central sound that English does not really have; it is one of the more distinctive Romanian vowels
• ț as in dimineața: pronounced ts, like the end of English cats

A rough pronunciation guide for the whole sentence is:

seh-see-OO-neh-ah deh oh-ree-en-TA-reh in-CHE-peh dee-mee-NYAH-tsa

That is only approximate, but it can help at first.

Yes, orientare is a feminine noun, and sesiune is also feminine.

It matters mainly when you use articles or adjectives with them.

For example:

• o sesiune = a session
• sesiunea = the session
• o orientare = an orientation / a guidance process
• orientarea = the orientation

In this sentence, you do not see adjective agreement, but knowing the noun gender helps when building other sentences.

Yes. A începe can be translated as both to begin and to start, depending on context.

So this sentence could naturally be understood as:

• the orientation session begins in the morning
• the orientation session starts in the morning

English choice depends more on style than grammar here.

Not by itself. În dimineața usually needs something after it, such as:

• în dimineața aceasta = this morning
• în dimineața zilei de luni = on Monday morning

If you just want the general meaning in the morning, Romanian normally uses:

• dimineața

So the original sentence is the correct natural version:

• Sesiunea de orientare începe dimineața.