International Standard Bible Encyclopedia (1915)
rab’-sha-ke, rab-sha’-ke (rabhshaqeh): A compound word, the first part, rabh, indicating "head" or "chief" (see Rab-mag; Rab-saris). The second part, which in the Aramaic, probably meant "cupbearer," had in this connection and elsewhere, according to later discoveries, an extended significance, and meant chief officer, i.e. chief of the heads or captains.
Walter G. Clippinger