From epi and luo; to solve further, i.e. (figuratively) to explain, decide -- determine, expound.
see GREEK epi
see GREEK luo
a. properly, to unloose, untie (German auflösen) anything knotted or bound or sealed up; (Xenophon, Theocr, Herodian).
b. to clear (a controversy), to decide, settle: Acts 19:39; to explain (what is obscure and hard to understand): Mark 4:34 (as in Genesis 41:12 variant; Philo, vita contempl. § 10; de agricult. § 3; Sextus Empiricus, 2, 246; γριφους, Athen. 10, p. 449 e.; also in middle, Athen. 10, p. 450 f.; Josephus, Antiquities 8, 6, 5, and often by the Scholiasts).