Το πρόσωπό του έδειξε αηδία.

It means his face.

• το = the
• πρόσωπο = face / person depending on context
• του = his

In this sentence, πρόσωπο clearly means face, not person.

This happens because of the unstressed word του, which is an enclitic.

The basic noun is πρόσωπο. Normally the stress is on πρό-:

• πρόσωπο

But when an enclitic like μου, σου, του, της follows, Greek often adds a written accent to show the extra stress pattern:

• το πρόσωπό του
• το βιβλίό μου
• ο δάσκαλός μας

So πρόσωπό του is not a different word; it is the same noun written with an extra accent because of του.

Here, του means his.

Greek του can have more than one job, so learners often get confused:

1. Genitive article: of the
2. Weak pronoun / possessive: his, of him
3. Sometimes also to him in other contexts

In Το πρόσωπό του, it is the possessive pronoun meaning his.

Because πρόσωπο is a neuter singular noun, and Greek normally uses the definite article where English also uses the.

So:

• το πρόσωπο = the face
• το πρόσωπό του = his face / literally the face of him

Greek commonly keeps the article even when English would just say his face.

Έδειξε is the aorist form of δείχνω (to show).

Here it means:

• showed
• displayed

More specifically, it is:

• 3rd person singular
• past tense
• perfective aspect: a single whole action/event

So έδειξε means he/she/it showed.
In this sentence, the subject is Το πρόσωπό του (his face), so: his face showed...

The difference is mostly aspect:

• έδειξε = showed as a complete event
• έδειχνε = was showing / used to show / showed continuously

So:

• Το πρόσωπό του έδειξε αηδία. = his face showed disgust at that moment / in that event
• Το πρόσωπό του έδειχνε αηδία. = his face was showing disgust / looked disgusted over a period of time

The given sentence chooses the aorist, so it presents the reaction as a single completed occurrence.

It is the accusative singular, because it is the direct object of έδειξε.

The verb δείχνω takes an object:

• δείχνω κάτι = I show something

So here:

• έδειξε αηδία = showed disgust

A useful thing to know is that for this noun, the nominative and accusative singular look the same:

• nominative: η αηδία
• accusative: την αηδία

Without the article, you just see αηδία.

Because Greek often leaves out the article with abstract nouns when speaking in a general sense.

So:

• έδειξε αηδία = showed disgust

This sounds natural. It is similar to English, where we also usually say showed disgust, not showed a disgust.

If an article were used, it would usually make the meaning more specific or context-dependent.

Αηδία means disgust, revulsion, or sometimes nausea depending on context.

In this sentence, the best sense is disgust or revulsion.

Be careful: in other contexts, αηδία! can also be an exclamation like Gross! or Disgusting!

No. Πρόσωπο has several meanings, including:

• face
• person
• figure / character in some contexts

In this sentence, because it showed disgust, the meaning is clearly face or facial expression.

Yes, it is natural and understandable.

It sounds a bit literary or descriptive, because it treats his face as the thing revealing emotion:

• Το πρόσωπό του έδειξε αηδία.

In everyday speech, Greek might also use other natural expressions such as:

• Έδειξε αηδία. = He showed disgust.
• Το πρόσωπό του έδειχνε αηδία. = His face showed disgust.
• Στο πρόσωπό του φάνηκε αηδία. = Disgust appeared on his face.

So the given sentence is fine, especially in narration.

Yes. Greek word order is more flexible than English.

The neutral order here is:

• Το πρόσωπό του έδειξε αηδία.

But other orders are possible, depending on emphasis:

• Έδειξε αηδία το πρόσωπό του.
• Αηδία έδειξε το πρόσωπό του.

These all mean roughly the same thing, but the emphasis changes.
The original version is probably the most straightforward for a learner.

A rough pronunciation is:

to PRÓ-so-PO tu É-dik-se a-i-DÍ-a

A few notes:

• πρ in πρόσωπο is like pr
• σω sounds like so
• ει in έδειξε sounds like ee
• ξ sounds like ks
• αι in αηδία is pronounced separately here: a-i-

So αηδία is pronounced something like a-ee-THEE-a in Modern Greek pronunciation, with the stress on -δί-.

Greek often expresses emotions through a body part or visible sign, especially in descriptive writing.

So Greek may say things like:

• Το πρόσωπό του έδειξε αηδία.
• Τα μάτια του έδειχναν φόβο.
• Η φωνή της έδειχνε αγωνία.

English can do this too, but it more often prefers adjectives:

• He looked disgusted.
• His face showed disgust.

So this is a normal descriptive Greek pattern, not something strange or ungrammatical.

The dictionary forms are:

• πρόσωπο = face, person
• δείχνω = to show
• αηδία = disgust

The sentence uses:

• πρόσωπό = πρόσωπο with accent change before enclitic του
• έδειξε = aorist of δείχνω
• αηδία = accusative singular, same form as nominative here