"among them, in the midst of them," c. 1200, ther-among; see there + among.
Often written as one word from mid-15c. Middle English also had there-amid "in the midst of them; there present" (ther-amidde, c. 1200), but also there-mid "by the use of which," from Old English þær-mid.
该词起源时间：约1200年
