Questions & Answers about 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.