Commence
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
To commence a suit is to demand something by the institution of process in a court of justice.
Cohens v. Virginia, 6 Wheat. 408, 5 In Ed. 257.
To "bring" a suit is an equivalent term; an action is "commenced" when it is "brought," and vice versa.
Goldenberg v. Murphy, 108 In S. 162, 2 Sup. Ct 388, 27 I Ed. 686.