re-nu': The word is used in various senses:
(1) of material things, e.g.Ps 104:30; here it means to give a new appearance, to refresh, to restore the face of the earth;
(2) in1Sa 11:14, to establish more firmly the kingdom by reinstalling King Saul;
(3) in2Ch 15:8, to rebuild or repair the broken altar;
(4) inLa 5:21, "renew our days," restore the favors of former days;
(5) inIsa 41:1, `let them gather together, or marshal their strongest arguments for answer';
(6) inPs 103:5;Isa 40:31, it refers to the restoring of spiritual strength;
(7) in the New Testament it invariably refers to spiritual renewal, e.g.Ro 12:2;2Co 4:16;Eph 4:23;Col 3:10;Tit 3:5;Heb 6:6; all derivatives of kainos, "new."
G. H. Gerberding