disinvestment (n.)youdaoicibaDictYouDict[disinvestment 词源字典]
1938, first recorded in writings of J.M. Keynes, from dis- + investment. The verb disinvest in this sense is a back-formation attested from 1961. Related: Disinvested; disinvesting.[disinvestment etymology, disinvestment origin, 英语词源]