An Etymological Dictionary of the German Language/heim
Appearance
-heim, adv., from MidHG. and OHG. heim, acc. sing., ‘home(wards),’ and MidHG. and OHG. heime, dat. sing., ‘at home’; in the other dialects, except Goth., the respective substs. in the cases mentioned are likewise used adverbially in the same sense. For further references comp. Weile.