Questo motore è potente.

Because motore is a masculine singular noun.

In Italian, words like questo / questa / questi / queste must agree with the noun they describe:

• questo = masculine singular
• questa = feminine singular
• questi = masculine plural
• queste = feminine plural

Since motore is masculine singular, the correct form is questo motore.

In this sentence, you can tell from the words agreeing with it:

• questo is masculine singular
• potente is singular and works for both masculine and feminine singular, so it does not clearly show gender by itself

Also, many Italian nouns ending in -ore are masculine, and motore is one of them.

Its plural is motori, which also fits a masculine noun pattern.

Here questo is a demonstrative adjective.

It points to a specific noun, like English this in this engine.

It is called an adjective because it directly modifies the noun motore.

Compare:

• questo motore = this engine → demonstrative adjective
• questo è potente = this is powerful → demonstrative pronoun

So in your sentence, questo is describing motore, not standing alone.

Because è is the Italian verb essere in the third person singular present tense, meaning is.

So:

• io sono = I am
• tu sei = you are
• lui/lei è = he/she is

In Questo motore è potente, è simply means is.

The accent is important because it distinguishes è from e.

• è = is
• e = and

So:

• Questo motore è potente = This engine is powerful
• motore e potente would be wrong here, because e means and

The accent helps avoid confusion.

In Italian, most descriptive adjectives usually come after the noun.

So:

• un motore potente = a powerful engine

This is the most natural order for many ordinary descriptive adjectives.

Italian does sometimes allow adjectives before the noun, but that often changes the tone, style, or emphasis. For a straightforward description, motore potente is the normal pattern.

Because potente is the correct adjective form.

Many Italian adjectives belong to the -e adjective group. These adjectives usually have:

• -e in the singular for both masculine and feminine
• -i in the plural for both masculine and feminine

So:

• motore potente = masculine singular
• macchina potente = feminine singular
• motori potenti = masculine plural
• macchine potenti = feminine plural

So potente does agree with motore, but this adjective’s singular form does not change between masculine and feminine.

Yes, exactly.

To make the sentence plural, several words change:

• questo → questi
• motore → motori
• è → sono
• potente → potenti

So:

• Questo motore è potente. = This engine is powerful.
• Questi motori sono potenti. = These engines are powerful.

This is a good example of agreement across the whole sentence.

Often, yes. The exact English translation depends on context.

Motore can refer to a machine that produces motion or power, so in different contexts it may be translated as:

• engine
• motor

For example:

• motore della macchina often means car engine
• motore elettrico often means electric motor

So the Italian word is broader than a single fixed English equivalent.

No, not exactly.

• questo motore = this engine → points to a specific one near the speaker or in focus
• il motore = the engine → refers to a specific engine already known from context

So questo is more demonstrative and specific in the sense of this one.

Also, when you use questo, you normally do not add the article:

• questo motore ✅
• il questo motore ❌

Questo is pronounced roughly like KWEH-stoh.

A few helpful points:

• qu in Italian is usually pronounced like kw
• the e is a clear vowel, not reduced like many English unstressed vowels
• the stress is on the first syllable: QUES-to

So it sounds approximately like KWEH-stoh.

Potente is pronounced roughly poh-TEN-teh.

Helpful notes:

• the stress is on the middle syllable: po-TEN-te
• the final e is pronounced clearly
• Italian vowels are usually pronounced more fully than in English

So do not swallow the ending. It is not poh-TENT; it is poh-TEN-teh.

No, that would not be normal Italian.

Italian usually needs an article or another determiner before a singular countable noun in a sentence like this. So you would normally say one of these:

• Questo motore è potente. = This engine is powerful.
• Il motore è potente. = The engine is powerful.
• Un motore potente... = A powerful engine...

A bare singular noun like motore usually does not work here.

No. Italian often omits subject pronouns when they are not needed.

In this sentence, the subject is not a pronoun like it. The subject is the noun phrase Questo motore, so nothing is missing.

Italian does allow sentences like:

• È potente. = It is powerful.

But that would only work when the subject is already understood from context. In your sentence, Questo motore explicitly names the subject.

Yes, but it is a different structure.

• Questo motore è potente. = This engine is powerful.
• Questo è un motore potente. = This is a powerful engine.

The first sentence talks directly about the engine and describes it. The second sentence uses questo as a pronoun (this) and then identifies what it is.

Both are correct, but they are not grammatically identical.

A few key things:

1. Agreement

   • questo matches motore in gender and number.

2. The verb

   • è is the form of essere meaning is.

3. Adjective position

   • potente comes after the noun, which is very common in Italian.

4. The accent

   • è must have the accent, because e means and.

5. Pronunciation

   • pronounce all the vowels clearly: QUES-to mo-TO-re è po-TEN-te

This sentence is short, but it shows several very typical Italian patterns.