Or pirīdu.
No etymology can be suggested.
    
 
          
          
          
  
    
      No etymology can be suggested. Hardly the same as birītu “space between, baulk” in view of the semantic difference.
    
 
          
  
    
      -u- in Akk. (alongside with -i-) and Arm. (Syr. and Mnd.) is likely a secondary development under the influence of b-.
For the meaning ‘lap’, see *barak- ‘chest, thorax’. See discussion in [Holma 1911 95] where the author tends to treat birku ‘knee’ and birku ‘genitals’ as the same word, quoting, at the same time, Arb. rakab- ‘pubis’ as a possible cognate to the latter.
    
 
          
  
    
      
        
          Akkadian
        
      
      
        
          birḳu - lightning
            (CAD B 258, AHw. 122)
        
       
     
   
 
          
  
    
      
        
          Akkadian
        
      
      
        
          bīrtu - citadel, castle (as part of a city); fort (placed in strategic locations outside of cities and villages)
            (CAD B 261, AHw. 129, 1548)
        
       
     
   
 
          
  
    
      
        
          Akkadian
        
      
      
        
          bīru - bull, young cattle
            (CAD B 266, AHw. 130)
        
       
     
   
 
          
  
    
      
        
          Akkadian
        
      
      
        
          bīru - 1. mile (a measure of length – over l0 kilometers – used for measuring long distances), 2. double hour (twelfth part of a full day), 3. twelfth part of the circle (30°)
            (CAD B 208, AHw. 130)
        
       
     
   
    
      No etymology can be suggested.
    
 
          
  
    
      
        
          Akkadian
        
      
      
        
          bīru - mile (a measure of length – over l0 kilometers – used for measuring long distances); 2. double hour (twelfth part of a full day); 3. twelfth part of the circle (30°)
            (CAD B 208, AHw. 130)
        
       
     
   
    
      Var. bēru.
No etymology can be suggested.