unduly or tediously prolonged or repetitious
a prolix speech
given to using more words than are needed in speaking or writing; long-winded
On important topics it is better to be a good deal prolix than even a little obscure — Poe
prolixity /-ʹliksiti/ noun
prolixly adv
[Middle English via French from Latin prolixus extended, from pro-1 + liquēre to be fluid]