adjective desirous of revenge; vengeful.He had cheated on her during their marriage, and she became vindictive during their divorce. See the full entry

transitive verb to put at risk; endanger.His reckless driving imperiled the lives of his passengers. See the full entry

noun the outer boundary of a circle or other curvilinear figure or area; perimeter.In the geometry class, students learned how to measure the circumference of various round objects like bicycle wheels and…

transitive verb to take and hold (a right, position, office, or the like) illegally, wrongfully, or by force.While the king was away from the capital, his scheming brother usurped the throne.She felt…

noun a leader, especially a speaker or politician, who attempts to persuade and to gain a following by appealing to the emotions and prejudices of the public, rather than by rational argument.She…