Akkadian
kamˀatu - truffle
(CAD K 120, AHw. 432)
J.-M. Durand suggests that the word designates not the truffle, but a different type of mushroom (Durand 1997:312). According to H. Reculeau it should be a representative of terfezia family.
For the etymology, see the discussion in Kogan 2012a:257f.