adjective.
in the manner of a dastard; marked by cowardice; pusillanimous
adjective.treacherous; given to backstabbing
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
despicably cowardly
Word Usage
"British Ambassador to Afghanistan William Patey said that what he called a "dastardly, cowardly attack designed to attack British interests" had instead caused the deaths of many Afghans"