Akkadian

burru - (a cereal) (CAD B 330, AHw. 140)

See most recently Kogan 2012: 246 (perhaps a West Semitism).

PWS
*burr- - wheat (Fronzaroli 1969b, pp. 12, 27, 34, Kogan 2011: 203, Kogan 2012: 246)