This is the 1306th most frequent Arabic word.
غفير
"غفير" in Arabic means "guard" or "watchman."
غفيرا here describes the character as a diligent and responsible protector, applied to emphasize guarding duties.
كان حارس البوابة غفيرًا يحمي المكان.
The gatekeeper was a guard protecting the place.
غفير modifies جمع here, meaning 'large,' to describe the vastness or multitude of people.
وصل جمع غفير من الناس إلى الساحة للاحتفال.
A large crowd of people arrived at the square to celebrate.
غفير is used to describe 'عدد' (number) to convey the idea of a large quantity.