固める
堅める
Reading
                Kana: 
                かためる
            
                    
                Romaji: 
                katameru
            
            Definitions
                    1
                
                to harden; to freeze; to strengthen; to solidify; to make (a fist); to tramp down (snow, dirt)
                            See also:  
                                                            土を固める
    (reading つちをかためる)
                                                    
                                                                            
                    2
                
                to put together; to collect; to gather; to consolidate
                    3
                
                to make secure; to stabilize; to settle down; to strengthen (belief, resolution, etc.); to establish (evidence)
                            See also:  
                                                            身を固める
    (reading みをかためる, entry #1)
                                                    
                                                                            
                    4
                
                
            
                    5
                
                to wear for a specific purpose (armor, coat, etc.)
                            Note: 
                            in the form に身をかためる
                        
                                                                                                                    
                    6
                
                to swear; to resolutely vow; to sincerely promise
                    7
                
                to tie tightly; to fasten
                    8