Abusing

verb

1. To put to a wrong use; to misapply; to use improperly; to misuse; to use for a wrong purpose or end; to pervert

   "He abused his authority."

2. To injure; to maltreat; to hurt; to treat with cruelty, especially repeatedly.
3. To attack with coarse language; to insult; to revile; malign; to speak in an offensive manner to or about someone; to disparage.
4. To imbibe a drug for a purpose other than it was intended; to intentionally take more of a drug than was prescribed for recreational reasons; to take illegal drugs habitually.
5. To violate; defile; to rape.