Detestable (adjective)

1. Deserving or causing strong dislike or hatred; repugnant.
2. Extremely unpleasant or objectionable.

Origin:

Late middle english: from latin detestabilis, from detestari "abominate, curse" (from de- "thoroughly" + testari "witness, attest").

Examples:

1. The dictator's actions were detestable and caused widespread outrage.
2. His behavior at the party was detestable, and he was not invited back.
3. The smell of cigarette smoke is detestable to many people.
4. His racist comments were detestable and not tolerated.
5. The cruelty of animal testing is detestable.