|Noah Webster's Dictionary|
(a.) Incapable of being adequately described; inexpressibly bad; unutterable; as, unspeakable grief or rage.
Unspeakable (5 Occurrences)
Matthew 28:8 They quickly left the tomb and ran, still terrified but full of unspeakable joy, to carry the news to His disciples. (WEY)
Romans 7:13 Did then a thing which is good become death to me? No, indeed, but sin did; so that through its bringing about death by means of what was good, it might be seen in its true light as sin, in order that by means of the Commandment the unspeakable sinfulness of sin might be plainly shown. (WEY)
2 Corinthians 9:15 Now thanks be to God for his unspeakable gift! (WEB KJV ASV DBY WBS YLT)
2 Corinthians 12:4 how he was caught up into Paradise, and heard unspeakable words, which it is not lawful for a man to utter. (WEB KJV WEY ASV DBY WBS)
1 Peter 1:8 whom not having known you love; in whom, though now you don't see him, yet believing, you rejoice greatly with joy unspeakable and full of glory- (WEB KJV WEY ASV DBY WBS YLT)