hell–bent 
/ˈhɛlˌbɛnt/ adjective
/ˈhɛlˌbɛnt/ adjective [more hell–bent; most hell–bent] : very determined to do something especially when the results might be bad — usually + on ▪ He's hell-bent on (getting) revenge. ▪ They seem to be hell-bent on starting a war. — sometimes followed by to + verb in U.S. English ▪ They seem to be hell-bent to start a war.
