A franquia reduz a indemnização.

Not in this sentence.

In general Portuguese, franquia can mean franchise (as in a business franchise). But in insurance language, franquia usually means the deductible or excess: the part of the cost that the insured person pays before the insurer pays the rest.

So here, a franquia reduz a indemnização means that the deductible lowers the amount paid out.

Because a is the feminine singular definite article, meaning the.

Both nouns here are feminine singular:

• a franquia
• a indemnização

So the sentence is literally:

• the deductible reduces the compensation

Portuguese uses definite articles very often, sometimes more often than English does.

It can be either, depending on context.

In Portuguese, a + noun can refer to:

• a specific thing already known from the context, or
• a general concept in a formal statement

In insurance documents, this kind of sentence often states a general rule:

• A franquia reduz a indemnização.
  = The deductible reduces the compensation / payout.

So even though it uses a, it may still sound general, not just specific.

Reduz is the 3rd person singular present form of the verb reduzir (to reduce).

It matches the subject a franquia, which is singular:

• a franquia reduz = the deductible reduces

Compare:

• a franquia reduz
• as franquias reduzem

So the verb form is singular because the subject is singular.

The structure is:

• A franquia = subject
• reduz = verb
• a indemnização = direct object

So:

• the deductible = the thing doing the action
• reduces = the action
• the compensation/payout = the thing affected by the action

This is very similar to normal English word order.

If you are learning European Portuguese, indemnização is the form you should expect to see.

In Brazilian Portuguese, indenização is much more common.

They mean the same thing: compensation, indemnity, or payout, depending on context.

So this spelling is a useful reminder that the sentence is in Portuguese from Portugal.

A rough pronunciation guide is:

uh frun-KEE-uh rreh-DOOZH uh in-dem-nee-zah-SOWN

A more Portuguese-like pronunciation is approximately:

/ɐ fɾɐ̃ˈki.ɐ ʁɨˈduʒ ɐ ĩdɨmnizɐˈsɐ̃w̃/

A few helpful points:

• franquia has the stress on -qui-
• reduz has the stress on the last syllable
• in connected speech, the final z in reduz links smoothly to the following a
• indemnização has strong stress on -ção

European Portuguese reduces unstressed vowels a lot, so it may sound shorter and less open than you expect from the spelling.

Yes. It sounds neutral to formal, and very natural in insurance, legal, or contractual language.

Words like:

• franquia
• reduz
• indemnização

fit well in policy documents, claim explanations, and official statements.

In casual conversation, someone might sometimes explain the same idea less formally, for example by talking about the amount you receive rather than using indemnização.

Yes. Some possible rephrasings are:

• A franquia diminui o valor da indemnização.
  = The deductible decreases the amount of the compensation.

• A indemnização é reduzida pela franquia.
  = The compensation is reduced by the deductible.

• A franquia baixa o valor a receber.
  = The deductible lowers the amount to be received.

The original sentence, A franquia reduz a indemnização, is short, clear, and very typical of formal insurance language.