subserve（v.）
英 [səb'sɜ:v] 美 [səb'sɜv]
1610s, intransitive, "serve in a subordinate capacity;" 1670s, transitive, "be a useful instrument to," from Latin subservus, past participle of subservire "assist, come to the help of" (see subservient).
该词起源时间：1610年代