If you have read the book 99 days can you help me

Ais a group of letters having a special meaning that appears at the beginning of a word.

When first i engaged in this work, i resolved to leave neither words nor things unexamined, and myself with a prospect of the hours which i should revel away in feasts of literature . . –preface to a dictionary of the english language, samuel johnson what is the connotation of the word revel in this passage?

The development of new inventions in the field of space travel seemed rapid. how does the word rapid function in a sentence?