The Greek term epilysis derives from the verb epilyō, which suggests that riddles are
solved (Josephus, Ant. 8.167) or
ambiguities resolved (Philo, Agr. 16)
or sophistries exposed (Sextus, Adv.
Pyrrh. 2.246) or hidden meanings revealed (Mark 4:34). Epilysis basically means explanation or interpretation (Vettius
Valens 221.9; 330.10; Gen 40:8 Aquila; Clement, Paed. 2.1.14). Later the author admits that Paul’s writings are
“hard to understand” (3:16) and require careful interpretation. And in both of
his letters, he himself is giving them a “correct understanding” of the words
of the prophets (3:1). Hence, in 1:20 he indicates the need for correct or
traditional interpretation of obscure prophetic materials, claiming that
capability while denying it to his adversaries. (Jerome H. Neyrey, 2 Peter, Jude: A New
Translation with Introduction and Commentary [AYB 37C; New Haven: Yale
University Press, 2008], 184)
Further Reading:
Not By Scripture Alone: A Latter-day Saint Refutation of Sola Scriptura