The term 'leave suddenly' can be expressed in three different ways: VAMOOSE (7 letters), DECAMP (6 letters), and BOLT (4 letters). VAMOOSE is an informal term that originated in the 19th century, derived from the Spanish word 'vamos' which means 'LET's go'. DECAMP is a verb meaning to leave quickly and abruptly, often used in the context of military retreat. Finally, BOLT is a verb meaning to run away quickly, usually with a sense of urgency. All three terms are used to describe the act of leaving a place suddenly and unexpectedly.