Akkadian

diˀu - a grave disease characterized by a headache (CAD D 165, AHw. 174)

Cf. damû ‘to suffer from convulsions’ SB (CAD D 80, AHw. 166), dimītu ‘a disease (paralysis, dizziness (?), poisoning of the flesh’ CAD D 143. Though *VwV > VmV is normal for this period, these forms may also go back to the root *dmw/y (see *dwm ‘to be giddy; have pain in the head’, SED I No. 11v).

PS
*dwy/ˀ - to be ill, sick (SED I No. 12ᵥ; HALOT 216; DRS 231)