From: Miguel Carrasquer Vidal
>Here's a bran'-new etymology. I'd like to propose that *itunaz derives from PIE heteroclitic *o(:)dwl, *odulo-/*oduno-, *edwo:l, *eduno- 'pain, pang, evil' (reconstructed in a slightly different shape in the EIEC), which may or may not be connected with *h1ed- 'eat' (allegedly via "biting pain" or "pain that eats at you") -- but I would tentatively suggest a link with *od- 'hate, regard as evil' (Latin o:di:). Here are more cognates:And the interesting Arm. n-stem <erkn> "birth pains" < *edwo(:)n-.
>Hitt. idalus, Luw. adduwal- 'bad, evil'
>Toch. yolo 'evil' < *edwol-o:n
>Gk. odune: 'pain'
>OE atol 'savage, terrible' (thus formulaically of trolls and dragons in Beowulf)