c. 1300, jus, juis, jouis, "liquid obtained by boiling herbs," from Old French jus "juice, sap, liquid" (13c.), from Latin ius "broth, sauce, juice, soup," from PIE root *yeue- "to blend, mix food" (cognates: Sanskrit yus- "broth," Greek zymē "a leaven," Old Church Slavonic jucha "broth, soup," Lithuanian jūšė "fish soup"). Meaning "the watery part of fruits or vegetables" is from early 14c. Meaning "liquor" is from 1828; that of "electricity" is first recorded 1896.