debauch (v.) Look up debauch at Dictionary.com
1590s, from Middle French débaucher "entice from work or duty," from Old French desbaucher "to lead astray," supposedly literally "to trim (wood) to make a beam" (from bauch "beam," from Frankish balk or some other Germanic source akin to English balk (n.)). A sense of "shaving" something away, perhaps, but the root is also said to be a word meaning "workshop," which gets toward the notion of "to lure someone off the job;" either way the sense evolution is unclear.