General sense:
* κάτω (kato): This is the most common and general word for "below."
* υπό (ypo): This means "under" or "beneath" and is often used for things positioned physically below something else.
In specific contexts:
* κάτω από (kato apo): This literally means "below from" and is used to describe things located directly below something else.
* εις τα βάθη (eis ta bathē): This means "into the depths" and is used for things located deep below the surface.
Example sentences:
* Το βιβλίο είναι κάτω από το τραπέζι. (The book is below the table.)
* Η πόλη βρίσκεται κάτω από ένα λόφο. (The city is located below a hill.)
* Έζησε υπο την επιφάνεια της θάλασσας. (He lived below the surface of the sea.)
* Βρήκαμε το θησαυρό εις τα βάθη της θάλασσας. (We found the treasure in the depths of the sea.)
Ultimately, the most appropriate word will depend on the specific situation and meaning you want to convey.