العلي
كلمة العليّ في اللغة هي صفة مشبهة من العلوّ، والصفة المشبهة تدل...
The joints on the back side of the fingers.
"Baraajim" (knuckles) are the joints that appear on the back side of the fingers. Islam encourages to clean and take care of the knuckles, because the Arabs did not use to wash their hands after eating, so dirt used to gather on their knuckles.
"Baraajim" (sing. burjumah): knuckles; the bones of the finger joints on the back side of the fingers.
The joints apparent in the middle of the back of fingers, which could attract dirt.