This is the 2795th most frequent Arabic word.
سفير
Ambassador.
The word 'سفير' is used to denote a diplomatic representative of a country.
تم تعيينه سفيرًا لبلاده في فرنسا.
He was appointed as an ambassador to his country in France.
Here, 'سفير' metaphorically refers to someone representing or promoting a field, similar to being an advocate.
ذاك المغني يعد سفيرًا للأغنية العربية.
That singer is considered an ambassador for Arabic music.
In this case, 'سفير' is being used to describe someone as a representative or figurehead for a cause or movement.