Which word describes the act of engaging in inconsequential chatter?

The term that describes the act of engaging in inconsequential or meaningless chatter is "prattle." This word specifically denotes a type of talk that is trivial, silly, or devoid of depth, often focusing on insignificant topics. In everyday language, prattling usually involves speaking rapidly or idly without much thought, which aligns perfectly with the notion of inconsequential chatter.

The other terms do not capture the same nuances of triviality. "Discourse" refers to formal and organized communication, often involving deeper discussions or philosophies. "Communicate" is a broad term that encompasses the act of conveying information and does not imply a lack of substance. "Discuss" indicates an exchange of ideas or opinions, typically involving more meaningful content. None of these options convey the lighthearted, often frivolous nature of meaningless chatter encapsulated by "prattle."