Diffuseness
This sometimes helps, as, for instance, when the subject is hard; words that may be, strictly speaking, unnecessary still may make things easier for the reader by giving him more time to master the thought while his eye is running over the verbiage. So, a little water may prevent a strong drink from burning throat and stomach. A style that is too terse is as fatiguing as one that is too diffuse. But when a passage is written a little long, with consciousness and compunction but still deliberately, as what will probably be most easy for the reader, it can hardly be called diffuse.