lead off -
set in motion, cause to start; "The U.S. started a war in the Middle East"; "The Iraqis began hostilities"; "begin a new chapter in your life"
end,
terminate bring to an end or halt; "She ended their friendship when she found out that he had once been convicted of a crime"; "The attack on Poland terminated the relatively peaceful period after WW I"
jump-start,
jumpstart start or re-start vigorously; "The Secretary of State intends to jumpstart the Middle East Peace Process"
recommence begin again; "we recommenced his reading after a short nap"