From raba'; a fourth (part or side) -- fourth part, side, square.
see HEBREW raba'
H7253. reba
I. רֶ֫בַע noun masculineEzekiel 1:8
1 fourth part.
2 plural four sides; —
1 ׳ר construct, fourth part, of shekel 1 Samuel 9:8, of hin Exodus 29:40.
2 in Ezekiel, plural suffix four sides (אַרְבַּעַת always preceding): רְבָעָיו Ezekiel 43:16, רְבָעֶיהָ 43:17; רִבְעֵיהֶם 1:8; 10:11, הֶן- 1:17.