Divagate and Go astray

Divagate verb - Lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking.

Go astray and divagate are semantically related In some cases you can use "Go astray" instead a verb "Divagate".

Divagate and go astray are semantically related in digress topic. Sometimes you can use "Divagate" instead a verb phrase "Go astray", if it concerns topics such as endlessly.