frívolo, fútil, insustancial, pueril, superficial, trivial, vacuo
baladí, despreciable, insignificante, insustancial, intrascendente, pueril, superficial, trivial
anodino, común, corriente, fútil, gris, insignificante, insípido, insulso, insustancial, mediocre, ordinario, regular, soso, trivial, vulgar