La brûlure inquiète le secouriste, d’autant plus que le saignement continue.

Because inquiète is the verb inquiéter in the 3rd person singular present: inquiéter = to worry / to cause concern to.

So:

• La brûlure inquiète le secouriste = The burn worries the first-aider
• literally, The burn concerns/worries the rescuer

If you want to say is worried, French usually uses:

• être inquiet / inquiète = to be worried
• s’inquiéter = to worry / to become concerned

For example:

• Le secouriste est inquiet. = The first-aider is worried.
• Le secouriste s’inquiète. = The first-aider is getting worried / is worried.

So in your sentence, inquiète is an action done by la brûlure.

French word order is doing the job here.

• La brûlure comes before the verb, so it is the subject.
• le secouriste comes after the verb, so it is the direct object.

So the structure is:

• [Subject] + [verb] + [object]
• La brûlure
  • inquiète
    • le secouriste

That means:

• The burn worries the first-aider

Not:

• The first-aider worries the burn

This is a very common place where English speakers hesitate, because English often prefers to be worried about instead of to worry someone.

The accent is part of the verb form.

The infinitive is inquiéter. In some present-tense forms, the é in the stem changes to è:

• j’inquiète
• tu inquiètes
• il/elle inquiète
• ils/elles inquiètent

But:

• nous inquiétons
• vous inquiétez

This stem change helps reflect the pronunciation. So inquiète is not a different word here; it is just the correct conjugated form of inquiéter.

French usually uses an article where English often does too, and sometimes where English might omit one.

Here la brûlure means the burn. It refers to a specific burn already understood from context.

Similarly:

• le secouriste = the first-aider / the rescuer
• le saignement = the bleeding

French nouns very often need an article:

• la
• le
• un
• une
• etc.

So leaving it out would usually sound ungrammatical.

Brûlure is a noun meaning burn or burn injury.

It comes from the verb brûler = to burn.

Examples:

• une brûlure légère = a minor burn
• une brûlure grave = a serious burn

Be careful not to confuse:

• la brûlure = the burn / burn injury
• brûler = to burn
• ça brûle = it burns / it stings

So in your sentence, la brûlure is the injury itself.

Secouriste means first-aider, rescuer, or someone trained to give emergency aid.

The article le shows that this sentence is referring to a masculine person, or to a person whose gender is being treated as masculine in context:

• le secouriste = a male first-aider / the rescuer
• la secouriste = a female first-aider / the rescuer

The noun secouriste itself has the same form for masculine and feminine; only the article changes.

D’autant plus que is a fixed expression meaning something like:

• all the more because
• especially because
• all the more so since

In this sentence:

• La brûlure inquiète le secouriste, d’autant plus que le saignement continue.

the idea is:

• the burn is worrying already,
• and this is even more true because the bleeding is continuing.

So d’autant plus que adds an extra reason that strengthens the concern.

Not very naturally. It is better to learn it as a chunk.

Word-for-word breakdowns can help a little:

• d’autant plus = so much more / all the more
• que = because / since / that depending on context

But in real use, you should treat d’autant plus que as one expression.

Good natural English equivalents are:

• all the more because
• especially since
• all the more so because

Because le saignement focuses on the bleeding as a medical symptom or process, not just on the action of bleeding.

Compare:

• Le saignement continue. = The bleeding continues.
• La victime continue de saigner. = The victim continues to bleed.
• Ça saigne. = It’s bleeding. (more informal and less technical)

So le saignement continue sounds slightly more clinical or medical, which fits the context of a first-aider.

Because continue is the conjugated verb, while continuer is the infinitive.

Here the subject is le saignement (singular), so the verb is 3rd person singular present:

• le saignement continue = the bleeding continues

Conjugation of continuer in the present:

• je continue
• tu continues
• il/elle continue
• nous continuons
• vous continuez
• ils/elles continuent

So continue is the correct finite verb form for this sentence.

Because the full expression is d’autant plus que, and the que introduces the reason.

What follows que is a full clause:

• le saignement continue

So the structure is:

• main clause: La brûlure inquiète le secouriste
• added reason: d’autant plus que le saignement continue

You can think of que here as linking the extra explanation to the first statement.

Yes, both contain sounds that English speakers often find tricky.

For brûlure:

• û is a French u sound, not like English oo
• brû is pronounced with rounded lips
• the final -ure is not pronounced like English -ure in cure

For saignement:

• ai in saigne- sounds like è
• gn is like the ny sound in canyon
• -ment at the end is nasal; the final t is not pronounced

So saignement is roughly like sèny-man in a very approximate English-friendly guide, though not exactly.

Yes, but the meaning would shift slightly.

• La brûlure inquiète le secouriste parce que le saignement continue. = The burn worries the first-aider because the bleeding continues.

• La brûlure inquiète le secouriste, car le saignement continue. = similar, a bit more formal or explanatory

But d’autant plus que adds the idea of increased concern:

• the burn is already worrying,
• and the continuing bleeding makes it even more worrying.

So d’autant plus que is stronger and more nuanced than just because.

The comma separates the main statement from the added explanatory phrase.

Main statement:

• La brûlure inquiète le secouriste

Added intensifying reason:

• d’autant plus que le saignement continue

In writing, the comma helps show that the second part is an extra comment explaining why the concern is even greater. It is natural punctuation here.