This is the 30th most frequent Greek word.
μπορεί
"Μπορεί" means "can" or "may" in English.
In this sentence, 'μπορεί' expresses possibility, indicating that it's uncertain but possible for him to attend the meeting tomorrow.
Μπορεί να έρθει αύριο για τη συνάντηση.
He may come tomorrow for the meeting.
Here, 'μπορεί' conveys capability, implying that through effort, he has the ability to achieve his goal.
Αν δουλέψει σκληρά, μπορεί να πετύχει το στόχο του.
If he works hard, he can achieve his goal.
In this instance, 'μπορεί' is part of a negative expression, indicating incapacity or disbelief in the context described.