היא סבלה כל הלילה.

A natural Modern Hebrew pronunciation is:

hi savlá kol ha-LAI-la

Word by word:

• היא = hi
• סבלה = savlá
• כל = kol
• הלילה = ha-LAI-la

The main stress falls on -vlá in סבלה and on LAI in הלילה.

Because the verb is in the past tense, 3rd person feminine singular.

So:

• סבל = he suffered
• סבלה = she suffered

The -ה ending is a very common marker for she in the Hebrew past tense.

The dictionary form is לסבול, meaning to suffer.

This is very normal in Hebrew: the past-tense form does not always look exactly like the infinitive.
Here the root is ס־ב־ל.

So you might learn:

• לסבול = to suffer
• היא סבלה = she suffered

Because Hebrew often allows the subject pronoun to be stated or omitted.

Both are possible:

• היא סבלה כל הלילה
• סבלה כל הלילה

The full version with היא can sound a little clearer, more explicit, or slightly more emphatic.
If the subject is already obvious from context, Hebrew often drops the pronoun.

Literally, it is all the night or the whole night.

In natural English, we usually say all night.

So:

• כל = all
• הלילה = the night

Together, כל הלילה is the normal Hebrew way to say all night.

Because Hebrew often uses the pattern כל ה... to mean the whole ... or all the ....

So:

• כל הלילה = all night / the whole night
• כל היום = all day
• כל השבוע = all week

This is a very common structure.

This is an important difference:

• כל הלילה = all night, meaning one entire night
• כל לילה = every night

So in your sentence, כל הלילה refers to the duration of a specific night, not a repeated habit.

Because Hebrew can use time expressions directly, without a preposition, just like English can say all night.

So כל הלילה works as an adverbial time phrase by itself.

You could also hear:

• במשך כל הלילה = during the whole night / for the whole night

But כל הלילה by itself is completely natural and very common.

Yes. Hebrew past tense does not always make the same distinction that English makes between:

• she suffered
• she was suffering

The Hebrew sentence היא סבלה כל הלילה can fit either idea, depending on context.
In many cases, English chooses was suffering if the suffering is viewed as ongoing during the night, but Hebrew often just uses the simple past form.

No. לסבול can refer to different kinds of suffering or distress, for example:

• physical pain
• illness
• emotional suffering
• hardship
• discomfort

Depending on context, it can also be close to endured or went through.
So the sentence itself does not specify what kind of suffering it was.

No, Hebrew word order is somewhat flexible.

היא סבלה כל הלילה is a very normal, neutral order:

• subject
• verb
• time phrase

But you could also say:

כל הלילה היא סבלה

That puts more emphasis on all night.
The basic meaning stays the same, but the focus changes slightly.