Do not let the discussion fragment into a desultory conversation with no clear direction.
The careful study of a few books is better than the desultory reading of many.
Desultory readers are seldom remarkable for the exactness of their learning.
In these desultory ramblings she passed the cottage of Susan Nunsuch, a little lower down than her grandfather's.
His studies are very desultory and eccentric, but he has amassed a lot of out-of-the-way knowledge which would astonish his professors.