L'operaio mescola il cemento.

Because operaio starts with a vowel. In Italian, the singular definite article before a vowel is usually l' for both masculine and feminine nouns.

So:

• l'operaio = the worker
• not il operaio

Here operaio is masculine singular, and before a vowel Italian uses l'.

Examples:

• l'uomo = the man
• l'amico = the friend
• l'operaio = the worker

Operaio usually means a manual worker, laborer, or factory/construction worker. It is more specific than the general English word worker.

So in this sentence, l'operaio suggests someone doing practical, physical work, such as on a building site.

Compare:

• operaio = manual worker / laborer
• lavoratore = worker in a broader sense

A native English speaker might translate operaio as:

• worker
• laborer
• construction worker
  depending on context.

The apostrophe shows that the article has been shortened before a vowel.

Instead of using a full article form, Italian drops the final vowel and adds an apostrophe:

• lo or la → l' before a vowel

So:

• l'operaio
• l'amica
• l'uomo

This is called elision.

Mescola is the third-person singular present tense of mescolare.

So it can mean:

• he mixes
• she mixes
• it mixes

In this sentence, the subject is l'operaio, so:

• L'operaio mescola il cemento = The worker mixes the cement / The worker is mixing the cement

A quick mini-conjugation:

• io mescolo = I mix
• tu mescoli = you mix
• lui / lei mescola = he / she mixes
• noi mescoliamo = we mix
• voi mescolate = you all mix
• loro mescolano = they mix

It can mean both.

Italian often uses the simple present tense where English might use either:

• mixes
• is mixing

So L'operaio mescola il cemento could mean:

• The worker mixes the cement
  or
• The worker is mixing the cement

The exact meaning depends on context.

If Italian wants to strongly emphasize an action happening right now, it can also use:

• L'operaio sta mescolando il cemento = The worker is mixing the cement

But the simple present is very common and natural.

Italian uses the definite article much more often than English.

So where English might sometimes say:

• mixing cement

Italian often says:

• mescolare il cemento

Here il cemento can mean:

• the cement involved in the situation
• cement in a general material sense
• the cement the worker is handling

Using the article sounds natural in Italian.

This is the normal Italian word order:

subject + verb + object

So:

• L'operaio = subject
• mescola = verb
• il cemento = object

This is the most straightforward, neutral order.

Italian can change word order for emphasis, but this version is the plain, standard one.

Operaio is pronounced roughly like:

o-peh-RAH-yo

The stress falls on -ra-:

• o-pe-RA-io

The ending -aio sounds roughly like -ayo in English spelling.

So:

• l'operaio ≈ loh-peh-RAH-yo

Not an exact English pronunciation, but that is a helpful approximation.

Yes, operaio is masculine singular.

The feminine form is:

• operaia

So:

• l'operaio = the male worker
• l'operaia = the female worker

Plural forms:

• gli operai = the male/mixed plural workers
• le operaie = the female plural workers

The infinitive is mescolare, which means to mix.

So:

• mescolare = to mix
• mescola = he/she mixes, is mixing

This is a regular -are verb.

Yes. Mescolare is a regular -are verb.

Its present tense follows the usual pattern:

• io mescolo
• tu mescoli
• lui/lei mescola
• noi mescoliamo
• voi mescolate
• loro mescolano

So if you know other regular -are verbs like parlare or lavorare, this one works in the same basic way.

Yes, absolutely.

That means:

• The worker is mixing the cement

This uses stare + gerundio, a progressive form similar to English is mixing.

Compare:

• L'operaio mescola il cemento = the worker mixes / is mixing the cement
• L'operaio sta mescolando il cemento = the worker is mixing the cement

Both are correct, but the first is simpler and very common.

In this sentence, cemento is being used as a material noun, like cement in English.

So it is not really being counted as separate items. It refers to the substance itself.

That is why:

• il cemento = the cement

If you were talking about different kinds of cement, the plural cementi could exist, but that is much less common in everyday basic usage.

Often yes, because Italian verbs usually show the subject clearly.

So Mescola il cemento can be a complete sentence meaning:

• He/She is mixing the cement
• He/She mixes the cement

But in L'operaio mescola il cemento, the subject is stated explicitly for clarity or emphasis:

• The worker mixes the cement

Italian frequently omits subject pronouns like lui or lei, but nouns like l'operaio can of course be included when needed.