Which word indicates a lack of clarity in communication?

The term that indicates a lack of clarity in communication is "vague." When communication is described as vague, it means the message is not specific or detailed enough for the recipient to fully comprehend its meaning. This can lead to misunderstandings or confusion, as the intended message may be obscured by a lack of precision. Vague language often leaves room for interpretation, which can complicate effective communication.

Understanding the nuances of "vague" contrasts with terms like "clear," which conveys transparency and straightforwardness in communication. "Ambiguous," while also indicating a lack of clarity, often suggests that a statement could be understood in multiple ways, causing uncertainty. "Direct," on the other hand, typically refers to communication that is straightforward and unambiguous, aiming to eliminate confusion. Thus, "vague" is the most appropriate term to signify a lack of clarity.