commence · verb I or T /kəˈmens/Full view
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)

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