renunciar
resign
renounce
to give up, refuse, or resign
+
-ar
verb suffix
Renunciar means to resign and can be thought of as renounce0 + -ar1 (verb suffix1).
verb
  1. resign
    To give up or quit a position, right, or claim
    Decidió renunciar a su trabajo para viajar por el mundo. // He decided to resign from his job to travel the world.