Στερεώνω την αιώρα.

A rough pronunciation is:

steh-reh-OH-no teen eh-OH-ra

A few helpful notes:

• Στ = st
• αι in αιώρα is pronounced e, not ai as in English
• ρ is a tapped/flapped r
• The stress falls on -ώ- in both στερεώνω and αιώρα

So syllable by syllable:

• Στε-ρε-ώ-νω
• την
• αι-ώ-ρα

Because Greek often leaves out subject pronouns when they are clear from the verb ending.

• στερεώνω already means I secure / I am securing

So:

• Στερεώνω την αιώρα = I secure the hammock / I'm securing the hammock

If you want extra emphasis, you can add εγώ:

• Εγώ στερεώνω την αιώρα. = I’m the one securing the hammock.

στερεώνω is:

• 1st person singular
• present tense
• active voice

That is why it means I secure, I fasten, I fix, or, depending on context, I’m securing / fastening / fixing.

Greek present tense often covers both:

• a general/habitual action: I secure
• an action happening now: I’m securing

Yes. In Modern Greek, verbs are normally listed in dictionaries in the 1st person singular present form.

So the dictionary entry is στερεώνω.

A few present-tense forms are:

• στερεώνω = I secure
• στερεώνεις = you secure
• στερεώνει = he/she/it secures
• στερεώνουμε = we secure
• στερεώνετε = you (plural) secure
• στερεώνουν = they secure

Because αιώρα is the direct object of the verb, so it must be in the accusative case.

• η αιώρα = the hammock as the subject
• την αιώρα = the hammock as the object

In this sentence, I am doing the action, and the hammock receives the action, so Greek uses:

• την αιώρα

αιώρα is a feminine noun.

Its basic singular forms are:

• η αιώρα = nominative
• της αιώρας = genitive
• την αιώρα = accusative

A useful thing to notice: the noun itself stays αιώρα in both nominative and accusative singular; the article changes:

• η αιώρα
• την αιώρα

Because the next word, αιώρα, begins with a vowel.

In Greek, the final -ν in words like την is kept before vowels. So:

• την αιώρα is the normal form

You may hear τη before some consonants in everyday speech, but before a vowel, την is expected.

It can mean either one, depending on context.

Greek present tense often corresponds to both English:

• I secure the hammock
• I’m securing the hammock

Context tells you which is more natural. For example:

• as a general description of what you do: I secure the hammock
• while doing it right now: I’m securing the hammock

Yes, Greek word order is more flexible than English, because the endings and articles show grammatical roles.

The neutral, straightforward order here is:

• Στερεώνω την αιώρα.

If you want to emphasize the subject, you can say:

• Εγώ στερεώνω την αιώρα.

If you want to emphasize the object, Greek often uses object fronting, commonly with a weak pronoun:

• Την αιώρα τη στερεώνω.

But for a learner, Στερεώνω την αιώρα is the safest basic pattern.

Put δεν before the verb:

• Δεν στερεώνω την αιώρα.

That means:

• I do not secure the hammock
• I’m not securing the hammock

This is the standard way to negate a present-tense verb in Modern Greek.