► 名詞悪用  [あくよう]    
meaning:  abuse  rank: 3☆ 
制度の悪用 ⇨ Abuse of system  
(☛ Use something outside its intended purpose immorally for your gain)☆ 
彼は
制度を悪用して
私腹を
肥やしている ⇨ He’s abusing the system to feather his nest  
(☛ Use something outside its intended purpose immorally for your gain)More examples:- 彼は自分の地位を悪用した ⇨ He abused his position (of power)