*ḫarṭūm- - (long) nose, beak, trunk, etc. (SED I No. 137)

Likely derived from *ḫuṭm-­ ‘nose, snout, muzzle, beak’ (No. 139) through insertion of ­r­; one wonders whether it may be the result of metathesis of ­r suffixed or of contamination with some unidentified root. C. Sem. only unless Akk. ḫuṭṭimmu ‘snout, muzzle’ SB on [CAD Ḫ 265] is an assimilated form from *ḫurṭimmu (otherwise see in *ḫuṭm- ‘nose, snout, muzzle, beak’, No. 139).