The term 'persisted' is defined as continuing to exist or occur over a prolonged period of time. This term can be expressed in a variety of ways, such as 'endured' (7 letters), 'heldon' (6 letters), 'hungon' (6 letters), 'kepton' (6 letters), 'keptatit' (8 letters), and 'stayedthecourse' (15 letters). Each of these terms implies that the subject has maintained their commitment to a particular cause or goal despite any obstacles they may have faced.