divagate

They are not very easy to select from, for their author's singular tendency to divagation affects them.

That ended the Russian divagation, and it had the effect of making the table-talk impersonal.

With such hints for divagation, let us resume our way down the river, henceforth navigable by barges and bridled by locks.

He had an unconquerable and sometimes very irritating habit of digression, of divagation, of aside.