(adj): vs. relevant) -- (having no bearing on or connection with the subject at issue
(adj): (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects
(adj): vs. direct) -- (extended senses; not direct in manner or language or behavior or action
I was thinking that there must be a form of tangent that means this, but tangential means something different.
Tending to depart from the main point. Digressive is synonymous to rambling