O respeito é importante.

O is the definite article, like the in English, but Portuguese uses articles more often than English does.

In O respeito é importante, o respeito means respect in a general sense, not necessarily the respect in a very specific English sense.

Portuguese often uses the definite article with abstract nouns:

• O amor é poderoso.
• A paciência é necessária.
• O respeito é importante.

You may also hear Respeito é importante, but that sounds a bit more like a slogan, headline, or general statement without the article. O respeito é importante is very natural.

Because respeito is a masculine noun in Portuguese, so it takes the masculine singular article o.

• o respeito
• not a respeito

A useful clue is that many nouns ending in -o are masculine, although this is not a perfect rule for every word in Portuguese.

Also, be careful: a respeito de is a completely different expression meaning about or regarding:

• a respeito de você = about you

So in this sentence, o respeito is the noun respect.

Here, respeito is a noun.

It is the subject of the sentence:

• O respeito = subject
• é = verb
• importante = adjective

This matters because respeito can also appear in other forms related to the verb respeitar (to respect), but in this sentence it is clearly a noun because it comes with the article o.

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

So:

• eu sou
• você é
• ele/ela é

The accent is important because it distinguishes é from e:

• é = is
• e = and

The accent also shows the pronunciation. É is pronounced with an open vowel, roughly like eh.

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

Here, ser is used because the sentence expresses a general truth or an essential quality:

• O respeito é importante.

That is different from a temporary condition.

Compare:

• Ele é importante. = He is important.
• Ele está importante no projeto. = He is important/influential in the project right now.

That second type depends heavily on context and sounds more temporary or situational.

So in your sentence, é is the natural choice because it talks about respect in a general, lasting sense.

Because importante is a predicate adjective here. It describes the subject through the verb ser.

The structure is:

• subject + verb + adjective

So:

• O respeito é importante.
• A honestidade é essencial.
• O estudo é útil.

In English, you do the same thing:

• Respect is important.

So this word order is actually very similar to English.

In the singular, importante does not change for masculine or feminine.

So you can say:

• O respeito é importante.
• A amizade é importante.

The adjective stays importante in both cases.

What does change is the number:

• singular: importante
• plural: importantes

Examples:

• Os valores são importantes.
• As regras são importantes.

A rough Brazilian Portuguese pronunciation is:

o hehs-PEY-too eh eem-por-TAHN-chee

A few helpful notes:

• o often sounds like oo in Brazilian Portuguese when unstressed
• the r in respeito is often pronounced like an English h or a throaty sound, depending on the region
• ei in respeito sounds like ay
• é sounds like eh
• im in importante is nasal, so it sounds a bit like eem
• tante has a nasal vowel: TAHN
• in many Brazilian accents, te at the end sounds like chee

A more IPA-style version is approximately: [u ʁesˈpejtu ɛ ĩpoʁˈtɐ̃tʃi]

Regional pronunciation varies, so don’t worry if you hear small differences.

Yes, you can, but it changes the feel a little.

• O respeito é importante. = the most standard, natural full sentence
• Respeito é importante. = more concise, more like a slogan, headline, or broad principle

So both are possible, but O respeito é importante is usually the safer choice for learners.

Yes. The verb é is singular because the subject o respeito is singular.

• O respeito é importante.
• Os respeitos would be plural, but that is not the normal idea here

If the subject were plural, the verb and adjective would also match in number:

• Os valores são importantes.

So in your sentence:

• o respeito = singular
• é = singular verb
• importante = singular adjective form

Not in the same structure.

Respeito is a noun: respect
Respeitar is a verb: to respect

So:

• O respeito é importante. = correct
• Respeitar é importante. = also correct, but it means something slightly different in structure: To respect is important or Respecting is important

Both are natural, but one uses a noun and the other uses an infinitive verb:

• O respeito = the concept of respect
• Respeitar = the action of respecting