The term 'toss with vigor' can be summarized by the crossword solution 'HURL, ' which is a four-letter word. To HURL means to throw something with great force and energy, usually in an uncontrolled manner. It is often used to describe throwing objects with a lot of power, such as a ball or a stone. The phrase 'toss with vigor' implies that the action should be done with a lot of enthusiasm and energy.