com·mence 
/kəˈmɛns/ verb
com·menc·es; com·menced; com·menc·ing /kəˈmɛns/ verb formal : to begin [no obj] ▪ The festivities will commence with a parade. ▪ Their contract commences in January. ▪ They commenced to argue. = They commenced arguing. [+ obj] ▪ The court commenced criminal proceedings. ▪ The country has commenced preparations for war.
