Με το κατσαβίδι χαλαρώνω λίγο τη βίδα.

Greek often leaves out subject pronouns because the verb ending already shows who is doing the action.

Here, χαλαρώνω ends in -ω, which tells you the subject is I.

So:

• χαλαρώνω = I loosen / I am loosening
• εγώ χαλαρώνω = I loosen / I am loosening, but with extra emphasis on I

You would add εγώ only if you want contrast or emphasis.

Here με means with in the sense of using something as a tool.

So με το κατσαβίδι means:

• with the screwdriver
• using the screwdriver

Greek uses με + accusative for this idea. There is no separate instrumental case in Modern Greek.

Κατσαβίδι is a neuter noun, so it takes the neuter singular article το.

So:

• το κατσαβίδι = the screwdriver

After με, Greek uses the accusative case, but for many neuter nouns the nominative and accusative look the same, so το κατσαβίδι does not change form.

Χαλαρώνω is the present tense, first person singular.

Depending on context, the Greek present can mean:

• I loosen
• I am loosening

So this form can describe either a general action or something happening right now.

Also, Greek dictionaries usually list verbs in the first person singular present, so χαλαρώνω is also the dictionary form you would look up.

Λίγο means a little or slightly, and here it modifies the verb, not the noun.

So the idea is:

• I loosen the screw a little
• not the little screw

It tells you the action is done only to a small degree.

In this sentence, λίγο comes before the object, but it still modifies χαλαρώνω.

Greek word order is more flexible than English word order, so adverbs can move around more easily.

This sentence sounds natural:

• Με το κατσαβίδι χαλαρώνω λίγο τη βίδα.

You may also hear:

• Χαλαρώνω τη βίδα λίγο.
• Χαλαρώνω λίγο τη βίδα με το κατσαβίδι.

The meaning stays basically the same, but the emphasis changes a bit.

The full feminine accusative singular article is την, but in Modern Greek the final -ν is often dropped before many consonants.

So both of these can occur:

• τη βίδα
• την βίδα

In everyday Greek, τη βίδα is very common here.

Greek uses the definite article very often, more often than English in some contexts.

Here τη βίδα suggests a specific screw that speaker and listener can identify from the situation.

So:

• τη βίδα = the screw
• μια βίδα = a screw

Using the article here is completely normal Greek.

Yes, but they have different jobs.

• το κατσαβίδι is in the accusative because it comes after the preposition με
• τη βίδα is in the accusative because it is the direct object of χαλαρώνω

So Greek can absolutely have two accusative forms in one sentence if they belong to different structures.

Yes. Greek word order is fairly flexible, especially because articles and endings help show what each word is doing.

For example, you could also say:

• Χαλαρώνω λίγο τη βίδα με το κατσαβίδι.
• Με το κατσαβίδι τη βίδα τη χαλαρώνω λίγο.

These versions shift the emphasis, but the core meaning remains the same.

The original sentence sounds natural and neutral.

This is a useful vocabulary distinction.

• χαλαρώνω τη βίδα = I loosen the screw
• ξεβιδώνω τη βίδα = I unscrew the screw / remove it by turning

So χαλαρώνω means making it less tight, while ξεβιδώνω suggests actually turning it out, often much further or completely.

Because the sentence also has λίγο, it clearly means only a slight loosening.