abuse
• verb /byooz/ 1 use improperly or to excess. 2 treat with cruelty or violence, especially assault sexually. 3 speak to in an insulting and offensive way.
• noun /byooss/ 1 the improper use of something. 2 cruel and violent treatment, especially sexual assault. 3 insulting and offensive language.
— DERIVATIVES abuser noun.
— ORIGIN Latin abuti ‘misuse’.
Source Oxford Englisg Dictionary
http://www.askoxford.com/concise_oed/abuse?view=uk