supererogate（v.）
英 [ˌsju:pər'erəgeɪt] 美 [ˌsupə'erəgeɪt]
"do more than duty requires," 1590s, from Late Latin supererogatus, past participle of supererogare "pay out over and above" (see supererogation). Related: Supererogated; supererogating.
该词起源时间：1590年代