To talk much without coming to the point

One word substitute is Circumlocution.

Verbosity: the fact or quality of using more words than needed; wordiness.
Garrulous: excessively talkative, especially on trivial matters.
Loquacity: the quality of talking a great deal; talkativeness.
Circumlocution: the use of many words where fewer would do, especially in a deliberate attempt to be vague or evasive.