словарь английский - английский
- to set off на английском языке:
1. 
to start a journey
Английский слово "to set off«(to start a journey) встречается в наборах:
Top 100 phrasal verbs 76 - 1002. 
to depart
If we want to catch a train we have to depart at 8 am.
We were due to depart at 18:00 but the train did not leave Preston until 19:30.
to start 
to begin a journey or voyage 
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