These are the meanings of the letters LDLIR when you unscramble them.
            
                
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                    Drill (n.)
                    
                        A large African baboon (Cynocephalus leucophaeus).
                     
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                    Drill (n.)
                    
                        A light furrow or channel made to put seed into sowing.
                     
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                    Drill (n.)
                    
                        A marine gastropod, of several species, which kills oysters   and other bivalves by drilling holes through the shell. The most   destructive kind is Urosalpinx cinerea.
                     
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                    Drill (n.)
                    
                        A row of seed sown in a furrow.
                     
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                    Drill (n.)
                    
                        A small trickling stream; a rill.
                     
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                    Drill (n.)
                    
                        An implement for making holes for sowing seed, and sometimes   so formed as to contain seeds and drop them into the hole made.
                     
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                    Drill (n.)
                    
                        An instrument with an edged or pointed end used for making   holes in hard substances; strictly, a tool that cuts with its end, by   revolving, as in drilling metals, or by a succession of blows, as in   drilling stone; also, a drill press.
                     
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                    Drill (n.)
                    
                        Any exercise, physical or mental, enforced with regularity   and by constant repetition; as, a severe drill in Latin grammar.
                     
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                    Drill (n.)
                    
                        Same as Drilling.
                     
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                    Drill (n.)
                    
                        The act or exercise of training soldiers in the military   art, as in the manual of arms, in the execution of evolutions, and the   like; hence, diligent and strict instruction and exercise in the   rudiments and methods of any business; a kind or method of military   exercises; as, infantry drill; battalion drill; artillery drill.
                     
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                    Drill (v. i.)
                    
                        To practice an exercise or exercises; to train one's   self.
                     
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                    Drill (v. i.)
                    
                        To sow in drills.
                     
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                    Drill (v. i.)
                    
                        To trickle.
                     
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                    Drill (v. t.)
                    
                        To cause to flow in drills or rills or by trickling; to   drain by trickling; as, waters drilled through a sandy stratum.
                     
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                    Drill (v. t.)
                    
                        To cause to slip or waste away by degrees.
                     
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                    Drill (v. t.)
                    
                        To entice; to allure from step; to decoy; -- with on.
                     
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                    Drill (v. t.)
                    
                        To pierce or bore with a drill, or a with a drill; to   perforate; as, to drill a hole into a rock; to drill a piece of metal.
                     
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                    Drill (v. t.)
                    
                        To sow, as seeds, by dribbling them along a furrow or in   a row, like a trickling rill of water.
                     
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                    Drill (v. t.)
                    
                        To train in the military art; to exercise diligently, as   soldiers, in military evolutions and exercises; hence, to instruct   thoroughly in the rudiments of any art or branch of knowledge; to   discipline.