Violent
Part of speech: adjective
Definition: Involving extreme force or motion. Involving physical conflict. Likely to use physical force. Intensely vivid.
Example sentence: I believe there are more instances of the abridgement of freedom of the people by gradual and silent encroachments by those in power than by violent and sudden usurpations.
Unnatural
Part of speech: adjective
Definition: Not natural; supernatural or artificial.
Example sentence: Collaboration on a book is the ultimate unnatural act.