La douleur est moins forte aujourd'hui.

In French, singular countable nouns usually need an article, even when English would sometimes leave it out. So la douleur is the normal way to say the pain.

Also, douleur is a feminine noun, which is why the article is la.

• la douleur = the pain
• une douleur = a pain

In this sentence, la douleur refers to a specific pain already understood from the context.

Because nouns in French have grammatical gender, and douleur happens to be feminine. This is something you usually have to learn together with the noun.

You can tell it is feminine here because both the article and the adjective agree with it:

• la douleur
• moins forte

If it were masculine, you would expect forms like le and fort instead.

Est is the third-person singular form of être (to be).

The subject is la douleur, which is singular, so French uses:

• la douleur est... = the pain is...

This works just like English is in the pain is less intense today.

Because forte is an adjective describing la douleur, and adjectives must agree with the noun they describe.

Since douleur is:

• singular
• feminine

the adjective must also be singular feminine:

• masculine singular: fort
• feminine singular: forte

So:

• la douleur est moins forte not
• la douleur est moins fort

Moins means less. It is used to make a comparison of a lower degree.

So:

• moins forte = less strong / less intense

In this sentence, the idea is that the pain is weaker today than at another time, usually earlier or than expected.

Compare:

• plus forte = stronger / more intense
• moins forte = less strong / less intense
• aussi forte = as strong / as intense

Yes, fort / forte often means strong, but with things like pain, smell, taste, wind, noise, or emotion, it can also mean intense, severe, or powerful depending on context.

So une douleur forte is very natural French and means something like:

• strong pain
• severe pain
• intense pain

English often prefers severe or intense, while French commonly uses fort / forte.

Yes. Moins implies a comparison, even if the second part is not stated explicitly.

La douleur est moins forte aujourd'hui means the pain is less intense than before, than yesterday, than earlier, or than it was. French, like English, often leaves the comparison unstated when it is obvious from context.

If you want to say it explicitly, you could say:

• La douleur est moins forte qu'hier. = The pain is less intense than yesterday.
• La douleur est moins forte que ce matin. = The pain is less intense than this morning.

Aujourd'hui means today, and putting it at the end is very natural in French.

• La douleur est moins forte aujourd'hui.

French often places time expressions at the beginning or the end of the sentence. Both are possible:

• Aujourd'hui, la douleur est moins forte.
• La douleur est moins forte aujourd'hui.

The version with aujourd'hui at the end sounds very normal and smooth.

Aujourd'hui is an adverb of time. It tells you when something is true.

It does not change form, and it does not agree with anything.

Examples:

• Je travaille aujourd'hui. = I’m working today.
• Il fait chaud aujourd'hui. = It’s hot today.
• La douleur est moins forte aujourd'hui. = The pain is less intense today.

Yes. That is also correct and natural.

• moins forte = less strong / less severe / less intense
• moins intense = less intense

Both work well. Moins forte is very idiomatic in everyday French, especially when talking about pain. Moins intense may sound slightly more formal or clinical in some contexts.

A careful pronunciation would be approximately:

la du-lur eh mwan fort o-zhoor-dwee

A more IPA-style version is:

/la dulœʁ ɛ mwɛ̃ fɔʁt oʒuʁdɥi/

A few useful points:

• douleur has a French r sound at the end.
• moins contains a nasal vowel; the n is not pronounced as a full English n.
• forte ends with a pronounced t because of the final e in the feminine form.
• aujourd'hui has the sound zh like the s in measure.

Because French can leave the comparison implied, just like English can.

• The pain is less intense today. This naturally suggests than before.

If you want to include than, French uses que:

• La douleur est moins forte qu'hier. = The pain is less intense than yesterday.
• La douleur est moins forte que d'habitude. = The pain is less intense than usual.

So que is only needed when the second part of the comparison is stated explicitly.