BA, be

 BEN1    
 * FALLING OVER
   ben1 lok6 hi4 = collapsed
   
 * ICE

 * SIDE
   hiong4 lai4 ben1 = facing which direction ?
   lai3 ben1 = this side
   ai4 ben1 = that side
   dung1 ben1 tdiu2 = at the eastern end

 BEN3
 * FLAT
   ben3 tdat5 tdat = flat as a pancake
   tsak5 ben = crushed flat

 BEN4    
 * TO CHANGE
   ben4 zong4 = change appearance
   mao2 dit6 ben4 tsu1 = no escape from the circumstances

 BED5 = BET5
 * NORTH
   dung1 lam2 si1 bet5 = east south west north = all the four directions
   tui1 bed5 fung1 = blowing a northerly breeze

 BED6
 * FAECES
   o1 bet6 = to defecate
   lai2 bet6 = in the act of defecating (some times context is meaning in an involuntary manner)