importunar, insistir, macear, machacar, reiterar
contender, controvertir, debatir, deliberar, discutir, disputar, lidiar, litigar, polemizar, rivalizar, tratar
altercar, disputar, litigar, reñir
aferrarse, empecinarse, empeñarse, obstinarse, ratificarse, reafirmarse
competir, emular, luchar, pugnar, rivalizar