Unspeakable <1,,411, anekdiegetos>
denotes "inexpressible" (a, negative, n, euphonic, ekdiegeomai, "to declare, relate"), 2Co 9:15, "unspeakable" (of the gift of God); regarding the various explanations of the gift, it seems most suitable to view it as the gift of His Son.
<2,,412, aneklaletos>
denotes "unable to be told out" (eklaleo, "to speak out"), 1Pe 1:8, of the believer's joy.
<3,,731, arrhetos>
primarily, "unspoken" (a, negative, rhetos, "spoken"), denotes "unspeakable," 2Co 12:4, of the words heard by Paul when caught up into paradise. The word is common in sacred inscriptions especially in connection with the Greek Mysteries; hence Moulton and Milligan suggest the meaning "words too sacred to be uttered."
