prolixity (n.)

early 15c., of writing, etc., "lengthy, protracted, long and wordy," from Old French prolixe (13c.) and directly from Latin prolixus "extended, stretched out" (of hair, tails, etc., in Late Latin of speech), etymologically "poured out," from pro "forth" (see pro-) + base of liquere "to flow" (see liquid (adj.)).

Of persons, "long-winded, prone to indulge in lengthy discourse," 1520s.