Don't get caught up in the superficialities of social etiquette—what truly matters is genuine communication.

superficialities 是名词 superficiality 的复数形式。superficiality 由形容词 superficial（表面的、肤浅的）加上名词后缀 -ity 构成，表示"表面性、肤浅性"。 在这里，superficialities 指那些只注重表面形式而不重视实质内容的社交礼仪规范。