Cirumlocution is a term used to describe the use of unnecessarily long and complex language. It can be broken down into several related terms, such as diffuseness (11 letters), PROLIXITY (9 letters), VERBIAGE (8 letters), REDUNDANCY (10 letters), ROUNDABOUT (10 letters), TAUTOLOGY (9 letters), PLEONASM (8 letters), and periphrasis (11 letters). Diffuseness refers to the use of overly long and detailed language, while PROLIXITY is a more general term for speaking or writing in an overly wordy manner. VERBIAGE is the use of too many words, often with little meaning, while REDUNDANCY is the repetition of words or phrases that are unnecessary. ROUNDABOUT is a term for speaking in a circuitous manner, while TAUTOLOGY is the unnecessary repetition of the same idea in different words. PLEONASM is the use of more words than necessary to express an idea, and periphrasis is the use of indirect or ROUNDABOUT language. All of these terms are related to circumlocution, which is the use of unnecessarily long and complex language.