This is the 5317th most frequent Russian word.
освежить
To refresh.
Here, 'освежить' means to freshen or renew the atmosphere within a space, specifically by letting in fresh air.
Она решила освежить комнату, открыв окна.
She decided to freshen up the room by opening the windows.
In this context, 'освежить' refers to the act of revisiting and making one's understanding or memory clearer.
Перед экзаменом он попытался освежить свои знания.
Before the exam, he tried to refresh his knowledge.
Here, 'освежить' is used to denote updating or rejuvenating something, in this case, a menu, to make it more appealing or current.