The term 'STOP SUDDENLY' can be expressed in four different ways: PROP (4 letters), QUITCOLD (8 letters), COMETOAHALT (11 letters), and SLAMONTHEBRAKES (15 letters). PROP stands for 'pull over quickly, ' QUITCOLD means 'cease abruptly, ' COMETOAHALT is defined as 'come to a sudden stop, ' and SLAMONTHEBRAKES is an expression used to describe the act of pressing the brakes hard and fast. All of these terms refer to the same action, which is to stop suddenly.