This is the 10th most frequent Greek word.
είναι
"Είναι" means "is" or "are" in English.
Here, 'είναι' serves as the third-person singular form of the verb 'to be', indicating a state of being.
Αυτός είναι δάσκαλος.
He is a teacher.
'Είναι' is used here to describe the location of an object.
Το βιβλίο είναι στο τραπέζι.
The book is on the table.
'Είναι' introduces an abstract state or condition in this sentence.