stupefactive（adj.） 英 [stju:pɪ'fæktɪv] 美 [ˌstjupə'fæktɪv] "causing insensibility," early 15c., in a medical sense, from Medieval Latin stupefactivus, from stem of Latin stupefacere (see stupefy). As a noun, "that which causes insensibility" (1560s). Related: Stupefactiveness.该词起源时间：15世纪初
