What term refers to extended verbal expression in speech or writing?

The term that refers to extended verbal expression in speech or writing is discourse. Discourse encompasses a wide range of communication forms, including conversations, speeches, essays, and written texts that explore ideas in depth. It implies a level of complexity and depth in the expression, as opposed to merely conveying information or emotion briefly.

In contrast, candor refers to honesty or frankness in communication. Brevity indicates conciseness and the quality of expressing much in few words, which is the opposite of extended expression. Circumspect means being cautious or wary, particularly in speech and action, rather than focusing on the nature of verbal expression.