These are the meanings of the letters OKCBL when you unscramble them.
            
                
                - 
                    Block (n.)
                    
                        To obstruct so as to prevent passage or progress; to prevent   passage from, through, or into, by obstructing the way; -- used both of   persons and things; -- often followed by up; as, to block up a road or   harbor.
                     
- 
                    Block (n.)
                    
                        To secure or support by means of blocks; to secure, as two   boards at their angles of intersection, by pieces of wood glued to   each.
                     
- 
                    Block (n.)
                    
                        To shape on, or stamp with, a block; as, to block a hat.
                     
- 
                    Block (v. t.)
                    
                        A blockhead; a stupid fellow; a dolt.
                     
- 
                    Block (v. t.)
                    
                        A grooved pulley or sheave incased in a frame or shell   which is provided with a hook, eye, or strap, by which it may be   attached to an object. It is used to change the direction of motion, as   in raising a heavy object that can not be conveniently reached, and   also, when two or more such sheaves are compounded, to change the rate   of motion, or to exert increased force; -- used especially in the   rigging of ships, and in tackles.
                     
- 
                    Block (v. t.)
                    
                        A large or long building divided into separate houses or   shops, or a number of houses or shops built in contact with each other   so as to form one building; a row of houses or shops.
                     
- 
                    Block (v. t.)
                    
                        A piece of box or other wood for engravers' work.
                     
- 
                    Block (v. t.)
                    
                        A piece of hard wood (as mahogany or cherry) on which a   stereotype or electrotype plate is mounted to make it type high.
                     
- 
                    Block (v. t.)
                    
                        A piece of wood more or less bulky; a solid mass of wood,   stone, etc., usually with one or more plane, or approximately plane,   faces; as, a block on which a butcher chops his meat; a block by which   to mount a horse; children's playing blocks, etc.
                     
- 
                    Block (v. t.)
                    
                        A section of a railroad where the block system is used.   See Block system, below.
                     
- 
                    Block (v. t.)
                    
                        A square, or portion of a city inclosed by streets,   whether occupied by buildings or not.
                     
- 
                    Block (v. t.)
                    
                        Any obstruction, or cause of obstruction; a stop; a   hindrance; an obstacle; as, a block in the way.
                     
- 
                    Block (v. t.)
                    
                        The pattern or shape of a hat.
                     
- 
                    Block (v. t.)
                    
                        The perch on which a bird of prey is kept.
                     
- 
                    Block (v. t.)
                    
                        The solid piece of wood on which condemned persons lay   their necks when they are beheaded.
                     
- 
                    Block (v. t.)
                    
                        The wooden mold on which hats, bonnets, etc., are shaped.