The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
ed-
DEFINITION:
To eat; original meaning “to bite.” 1a.eat, from Old English etan, to eat; b.etch, from Old High German ezzen, to feed on, eat; c.ort, from Middle Dutch eten, to eat; d. (i)fret1, from Old English fretan, to devour; (ii)frass, from Old High German frezzan, to devour. Both (i) and (ii) from Germanic compound *fra-etan, to eat up (*fra-, completely; see per1). a–d all from Germanic *etan.2.edacious, edible, escarole, esculent, esurient; comedo, comestible, obese, from Latin edere, to eat. 3.prandial, from Latin compound prandium, lunch, probably from *prm-(e)d-yo-, “first meal,” *prm-, first; see per1). 4. Suffixed form *ed-un--.anodyne, pleurodynia, from Greek odun, pain (< “gnawing care”). 5.Samoyed, from Russian -ed, eater. (Pokorny ed- 287.) See also derivative dent-.
m-(e)d-yo-, “first meal,” *pr
, pain (< “gnawing care”). 5. Samoyed, from Russian -ed, eater. (Pokorny ed- 287.) See also derivative dent-. 
