improvement (or an intended improvement) in the existing form or condition of institutions or practices etc.; intended to make a striking change for the better in social or political or religious affairs

search; hunt, verb_ Present participle of search, adjective_ having keenness and forcefulness and penetration in thought, expression, or intellect, diligent and thorough in inquiry or investigation, exploring thoroughly

A flexible cover folded in the center and used as a holder for loose paper, An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet, a small book usually having a paper cover

not transmitting or reflecting light or radiant energy; impenetrable to sight