Meaning
Mastery mas'-ter-i, gebhurah, shelet, Aramaic; agonizomai, athleo): "Mastery" occurs twice in the Old Testament and twice in the King James Version of the New Testament: in Ex 32:18 (gebhurah, "might"), "the voice of them that shout for mastery"; in Da 6:24 ([~shelet, "to have power"), "The lions had the mastery of them"; in 1Co 9:25, agonizomai, "to contend for a prize," to be a combatant in the public games, is translated "striveth for the mastery," the Revised Version (British and American) "striventh in the games"; and in 2Ti 2:5, athelo, with the same meaning, is translated "strive for masteries," the Revised Version (British and American) "contend in the games." From the Greek we have the words "athlete," etc..
W. L. Walker
