Obese
mid 17th century: from Latin obesus ‘having eaten until fat’, from ob- ‘away, completely’ + esus (past participle of edere ‘eat’).
wiktionary
From Latin obēsus, derived from obedō(“I devour, eat away”), from ob(“away”) + edō(“I eat”)
etymonline
obese (adj.)
"exceedingly fat," 1650s, back-formation from obesity and in part from Latin obesus "fat, stout, plump," literally "that has eaten itself fat," past participle of obedere "to eat all over, devour," from ob "about; because of" (see ob-) + edere "eat" (from PIE root *ed- "to eat"). According to OED, "Rare before 19th c." Related: Obeseness. Latin obesus was translated in Old English as oferfæt "overfat." As Latin obesus also could be read as "eaten up," it also was used in a passive sense, "wasted away, lean."
