Le train est supprimé à cause de la grève.

Because this is a passive structure:

• est = is
• supprimé = past participle of supprimer

So Le train est supprimé literally means The train is removed/suppressed, but in transport French it means The train is canceled.

This is very common in announcements and notices. French often uses the passive for this kind of formal information.

That is a very common question. Both can relate to cancellation, but they are not used in exactly the same way.

In transport contexts:

• un train supprimé
• un vol supprimé
• un service supprimé

often means the service has been withdrawn/canceled.

Annulé is also possible in French, but it is more common with things like:

• un rendez-vous annulé = a canceled appointment
• un concert annulé = a canceled concert
• une réservation annulée = a canceled reservation

So in a railway announcement, supprimé sounds especially natural.

Because supprimé agrees with train, and train is:

• masculine
• singular

So the participle is supprimé.

Compare:

• Le train est supprimé. = masculine singular
• La ligne est supprimée. = feminine singular
• Les trains sont supprimés. = masculine plural
• Les lignes sont supprimées. = feminine plural

Use à cause de when it is followed by a noun:

• à cause de la grève = because of the strike

Use parce que when it is followed by a whole clause:

• parce qu'il y a une grève = because there is a strike

So in this sentence, à cause de is the natural choice because the cause is expressed as a noun phrase: la grève.

Because grève is a feminine singular noun, and after à cause de, French keeps the article:

• de + la grève → de la grève

Other examples:

• à cause du retard = because of the delay
  (de + le = du)
• à cause des travaux = because of the roadworks / construction
  (de + les = des)

So de la is simply the correct form before a feminine singular noun.

French usually needs an article where English often does not.

So French says:

• à cause de la grève
• pendant la grève
• à cause du mauvais temps

Even when English might just say because of strike action or because of bad weather, French normally uses an article.

Here la grève refers to the strike as a known situation affecting the trains.

Le train usually refers to a specific train that is known from the context:

• the train on the timetable
• the train you were expecting
• the train being announced

French often uses the definite article where English might also say the train in announcements.

If you said Un train est supprimé, that would mean A train is canceled, which sounds less specific and less natural in this kind of notice.

Yes. Supprimer has a broad meaning: to remove, to eliminate, to suppress, and in some contexts to cancel.

For example:

• supprimer un fichier = delete a file
• supprimer une taxe = remove a tax
• supprimer un train = cancel a train service

So the exact English translation depends on context. In a transport notice, cancel is the best translation.

Yes, but the nuance is slightly different.

• Le train est supprimé = the train is canceled / the train has been canceled as its current status
• Le train a été supprimé = the train was canceled / has been canceled, with more emphasis on the completed action

In announcements, est supprimé is very common because it gives the present status of the train.

Yes. Grève is a feminine noun:

• la grève
• une grève

So you say:

• à cause de la grève
• une grève nationale
• la grève continue

Yes, it sounds quite natural for a formal or official announcement, especially in transport.

For example, on a station board or over a loudspeaker, French often uses concise, impersonal wording like this.

A more conversational version might be:

• Le train ne circule pas à cause de la grève.
  = The train is not running because of the strike.

But Le train est supprimé à cause de la grève is exactly the kind of phrasing you would expect in official travel information.

You would change the article, the verb, and the participle agreement:

• Les trains sont supprimés à cause de la grève.

Breakdown:

• Le train → Les trains
• est → sont
• supprimé → supprimés

The rest stays the same.

The final n in train is not pronounced as a full n sound. Instead, it helps create a nasal vowel.

So train sounds roughly like trɛ̃.

A simple learner-friendly approximation is something like treh(n) with the sound coming through the nose, but not a strong English n at the end.

Also:

• est is often pronounced è
• supprimé has a clear final ay sound
• grève sounds like grehv

So the whole sentence flows roughly as:

luh trɛ̃ eh suh-pree-may ah kohz duh lah grehv

That is only an approximation, but it may help at first.