Suru verb - special class, Intransitive verb

to take one's leave; to excuse oneself; to leave; to depart

Suru verb - special class, Transitive verb

to resign (from); to step down; to leave (one's position); to quit

to decline; to turn down; to refuse

to do unwaveringly; to be prepared to do; to not mind doing

in the negative as ...を（も）辞さない, ...を（も）辞せず, etc.see 辞さない