from ἀποστέλλω; a delegate; specially, an ambassador of the Gospel; officially a commissioner of Christ ("apostle") (with miraculous powers):--apostle, messenger, he that is sent.
neuter and masculine respectively from δέω; a band, i.e. ligament (of the body) or shackle (of a prisoner); figuratively, an impediment or disability:--band, bond, chain, string.