Με τόση ζέστη έχω μεγάλη δίψα και θέλω κρύο νερό.

Here με does not mean a literal with in the English sense of possession. In this kind of expression, με + accusative can mean something like:

• with
• in
• under these conditions

So Με τόση ζέστη means:

• With so much heat
• In such heat
• When it’s this hot

It is a very natural Greek way to set the scene before the main statement.

Τόση agrees with ζέστη, which is a feminine singular noun.

So:

• τόσος = masculine
• τόση = feminine
• τόσο = neuter

Since ζέστη is feminine, Greek uses τόση.

Also, after με, the noun phrase is in the accusative, but for many feminine nouns like ζέστη, the accusative singular looks the same as the nominative. So you see:

• η τόση ζέστη (nominative, less likely in this exact phrase)
• με τόση ζέστη (accusative after με)

Same form, different function.

Ζέστη means heat or hot weather.

In this sentence, it refers to the weather or general temperature, not a specific physical source of heat. So Με τόση ζέστη is like saying:

• With this much heat
• In this hot weather
• Since it’s so hot

It is a very common everyday word in Greek.

Yes, literally it is I have thirst, but that is the normal Greek way to say I am thirsty.

Greek often uses έχω + noun in places where English uses to be + adjective. So:

• έχω δίψα = I am thirsty
• literally: I have thirst

This is one of the most important natural patterns to learn, because translating word-for-word from English would sound unnatural.

Yes. Διψάω means I am thirsty / I thirst.

So these are both possible:

• Έχω δίψα
• Διψάω

In everyday Greek, έχω δίψα is extremely common and very natural. Διψάω is also correct and common, but the sentence you were given uses the noun expression.

Yes, literally it means big thirst, but in Greek this is a normal way to say great thirst / very thirsty.

Greek often uses μεγάλος / μεγάλη / μεγάλο with abstract nouns in a way that sounds more natural in Greek than it would if translated word-for-word into English. So:

• μεγάλη δίψα = great thirst
• natural English meaning: very thirsty

So even though big thirst sounds odd in English, it is perfectly natural in Greek.

Because the phrase is indefinite and general.

Greek often leaves out the article in expressions like this, especially after verbs such as έχω when talking about a condition or need:

• έχω δίψα = I am thirsty
• έχω μεγάλη δίψα = I am very thirsty

If you added an article, it would sound more specific or marked in some contexts. Without the article, it sounds natural and general.

Because νερό is a neuter singular noun, so the adjective must also be neuter singular.

Adjective agreement in Greek is very important. The adjective matches the noun in:

• gender
• number
• case

So here:

• νερό = neuter singular
• κρύο = neuter singular form of cold

That gives:

• κρύο νερό = cold water

Compare:

• κρύος καφές = cold coffee (masculine)
• κρύα σούπα = cold soup (feminine)
• κρύο νερό = cold water (neuter)

Because it means cold water in a general, indefinite sense.

The speaker wants some cold water, not a specific already-known water. So Greek, like English, can leave it without the definite article:

• θέλω κρύο νερό = I want cold water

If you said θέλω το κρύο νερό, that would mean something more like:

• I want the cold water

That sounds specific, as if there is some particular cold water already being referred to.

Because Greek usually does not need subject pronouns when the verb ending already shows the person.

Here:

• έχω = I have
• θέλω = I want

So Greek does not need to say εγώ unless the speaker wants emphasis or contrast.

For example:

• Έχω μεγάλη δίψα = I’m very thirsty
• Εγώ έχω μεγάλη δίψα = I’m very thirsty (maybe implying someone else isn’t)

This is a very common feature of Greek.

All the main noun phrases here are in the accusative:

• με τόση ζέστη → accusative after με
• έχω μεγάλη δίψα → δίψα is the object of έχω
• θέλω κρύο νερό → νερό is the object of θέλω

However, many Greek singular nouns in -α or -η, and neuter nouns in -ο, have nominative and accusative forms that often look the same. So even though the case is important grammatically, the form may not visibly change.

The word order can change more freely in Greek than in English, though some orders sound more natural than others.

The given sentence is very natural:

• Με τόση ζέστη έχω μεγάλη δίψα και θέλω κρύο νερό.

But Greek could move parts around for emphasis, for example:

• Έχω μεγάλη δίψα με τόση ζέστη...
• Κρύο νερό θέλω... (emphasizing what I want)

Still, the original order is a normal, neutral way to say it.

Yes, και simply means and here.

It joins two linked ideas:

• έχω μεγάλη δίψα = I’m very thirsty
• θέλω κρύο νερό = I want cold water

Since the subject is the same in both parts, Greek does not repeat I.

So the structure is very straightforward:

• I’m very thirsty and I want cold water.

Yes, very natural.

It sounds like normal spoken Greek and uses common everyday patterns:

• με τόση ζέστη = with/in such heat
• έχω δίψα = I’m thirsty
• θέλω κρύο νερό = I want cold water

So this is the kind of sentence a native speaker could easily say in real life.