ḥəngugu - kind of black worm living in water
(TAmh. 40)
PWS
*ḥV(n)g- - kind of a worm, centipede
(SED II No. 100)
Poorly attested, the Common Semitic status questionable though the semantic coincidence is too remarkable to be neglected (however, the Tna. word is translated as ‘dung beetle’ in TED 247).