"the trait of being active and energetic and forceful"
"the operating part that transmits power to a mechanism"
"a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong"
"an act by a government body or supranational organization"
"the most important or interesting work or activity in a specific area or field"
"institute legal proceedings against; file a suit against"