parole (n.)youdaoicibaDictYouDict[parole 词源字典]
1610s, "word of honor," especially "promise by a prisoner of war not to escape," from French parole "word, speech" (in parole d'honneur "word of honor") from Vulgar Latin *paraula "speech, discourse," from Latin parabola (see parable). Sense of "conditional release of a prisoner before full term" is first attested 1908 in criminal slang.[parole etymology, parole origin, 英语词源]
parole (v.)youdaoicibaDictYouDict
1716, from parole (n.). Originally it was what the prisoner did ("pledge"); its transitive meaning "put on parole" is first attested 1782. Related: Paroled; paroling.