Dastard (noun)

A contemptibly cowardly or despicable person.

Origin:

Derived from the middle english word "dastard" meaning "coward".

Examples:

1. He was a dastardly villain who preyed on the weak.
2. His actions were those of a dastard.
3. His cowardice was dastardly in the face of danger.
4. The dastard betrayed his country and his comrades.
5. He was a dastard in every sense of the word.