commence · verb I or T /kəˈmens/
commence
C2 to begin something
Dictionary examples:
Building work will commence in the fall.
Shall we let the meeting commence?
Learner example:
Equip[p]ed with their cheap DV cameras, collaborating with young enthusiast[s] they strive to show what is worrying Poles and manage to commence a national discussion (Certificate of Proficiency in English; C2; Polish)