Infamous (adjective)

1. Having a very bad reputation; notorious.
2. Widely known and discredited or disreputable.
3. Having an extremely bad reputation, especially for something morally or legally reprehensible.

Origin:

From latin infamōsus, from infamis ("of bad reputatio.n")

Examples:

1. He is an infamous criminal.
2. The company had an infamous reputation for mistreatment of employees.
3. The infamous dictator was finally brought to justice.
4. The infamous group was responsible for several terrorist attacks.
5. The city was infamous for its high crime rate.