A liberdade é importante.

In Portuguese, it is very common to use the definite article with abstract nouns, especially when talking about something in a general sense.

So:

• A liberdade é importante. = Freedom is important.

Even though a literally means the, you should not translate word by word here. In this sentence, a liberdade is the natural Portuguese way to talk about the concept of freedom in general.

Portuguese has two main verbs for to be: ser and estar.

Here, é is from ser, and it is used because importante is presented as a general, essential quality of freedom.

• A liberdade é importante. = freedom is important by nature / in general

If you used está, it would suggest a temporary state or a context-dependent situation, which sounds less natural here.

• A liberdade está importante is not the normal way to express this idea.

So for general truths, definitions, and inherent characteristics, ser is the correct choice.

É is the 3rd person singular present of the verb ser (to be).

The subject is a liberdade, which is singular, so the verb must also be singular:

• a liberdade → singular
• é → singular

Some useful forms of ser in the present tense are:

• eu sou = I am
• tu és = you are
• ele/ela é = he/she is
• nós somos = we are
• vós sois = you are (plural, mostly formal/rare in everyday speech)
• eles/elas são = they are

Because importante is an adjective with the same form for both masculine and feminine singular.

So you get:

• o livro é importante = the book is important
• a liberdade é importante = freedom is important

Only the article shows the gender here:

• o = masculine
• a = feminine

But the adjective stays importante in both cases.

Its plural forms are:

• importante = singular
• importantes = plural

For example:

• As liberdades são importantes.

You usually learn the gender of a noun together with its article:

• a liberdade

That tells you it is feminine.

The ending -dade is also a very strong clue, because nouns ending in -dade are normally feminine in Portuguese:

• a liberdade
• a cidade
• a verdade
• a necessidade

So both the article and the noun ending point to feminine gender.

In European Portuguese, it is roughly pronounced like:

• uh lee-bair-DAHD(uh) eh im-pohr-TAHN-t(uh)

A few important pronunciation notes:

• A at the beginning is often reduced, sounding like a very short uh.
• liberdade has stress on -da-.
• Final -e in European Portuguese is often reduced, so importante does not sound like a strong final ee.
• é is pronounced like eh.

A more approximate European Portuguese IPA pronunciation is:

• [ɐ libɨɾˈðaðɨ ɛ ĩpuɾˈtɐ̃tɨ]

You do not need to master IPA, but it helps explain why spoken European Portuguese often sounds more reduced than Brazilian Portuguese.

It is possible in some contexts, especially in headlines, slogans, poetic language, or very stylised speech, but in normal standard Portuguese, A liberdade é importante is the most natural sentence.

So for a learner, the best default is:

• A liberdade é importante.

Without the article, it can sound less neutral or less complete in ordinary speech.

Yes, you can change the word order, but the meaning and emphasis change.

The neutral, normal order is:

• A liberdade é importante.

If you say:

• Importante é a liberdade.

it sounds more emphatic or literary, as if you are highlighting freedom in contrast with something else.

So the original sentence is the best basic pattern to learn first: subject + verb + adjective

Even when something is important in a current situation, Portuguese usually still uses ser with importante.

For example:

• É importante estudar agora. = It is important to study now.

That is because importante usually expresses importance as a quality or evaluation, not a temporary physical state.

So ser importante is the normal combination.

Not exactly.

• liberdade = freedom, liberty
• libertação = liberation, the act/process of being freed

So in your sentence:

• A liberdade é importante. = freedom is important

If you said:

• A libertação é importante.

that would mean liberation is important, which is a different idea.

Grammatically, yes, but it is not the normal structure for this meaning.

• A liberdade é importante. is a simple statement: freedom is important.
• a importante liberdade means something like the important freedom, which sounds much more specific, literary, or context-dependent.

So if you just want to describe freedom as important, keep the adjective after ser:

• A liberdade é importante.

The plural would be:

• As liberdades são importantes.

Changes:

• A → As
• liberdade → liberdades
• é → são
• importante → importantes

However, semantically, liberdade is more often used as an uncountable abstract noun in the singular, so A liberdade é importante is much more natural in general.