1. To move away from the subject you are talking or writing about and talk or write about something different for a while. English = digress. Idiomatic English = get off the point, go off the point, get sidetracked, go off the topic.
3. To change the course or destination of something, especially a telephone call. English = divert.
4. To make someone stop concentrating on what they are doing. English = distract.
5. Of someone, to be made by something or someone else to stop concentrating on what they are doing. English = (be) distracted.