Godan verb with 'ru' ending, Transitive verb
to take off; to jump; to leap
彼は多くの希望と不安を抱いて結婚にふみきった。He embarked on his marriage with many hopes and fears. to take the plunge; to decide; to embark on; to venture into; to launch out into
to step out of the ring
Sumo
Also written 踏切る【ふみきる】