Akkadian

agappu, gappu - wing (CAD K 185; AHw. 281)

Identified by [CAD] with kappu, but treated as a separate entry in [AHw], which seems right in view of the comparative data; note that in [AHw] agappu is also treated as a separate gloss independent of gappu [AHw 15].

PS
*gapp-, *ˀa-gapp- - wing (SED I No. 88)