This is the 9th most frequent Hebrew word.
או
"או" means "or" in English.
The word 'או' is used for providing a choice between two options.
אתה רוצה תה או קפה?
Do you want tea or coffee?
The usage here conveys an exclusive choice, emphasizing exclusion.
או זה או זה, לא שניהם.
Either this or that, not both.
Used here to express uncertainty or consideration of alternatives.