probably akin to χράομαι through the idea of contact; to smear or rub with oil, i.e. (by implication) to consecrate to an office or religious service:--anoint.
from ἀπό and στέλλω; set apart, i.e. (by implication) to send out (properly, on a mission) literally or figuratively:--put in, send (away, forth, out), set (at liberty).