to take responsibility for doing something important
взять на себя ответственность за выполнение важной задачи (vzyat' na sebya otvetstvennost' za vypolnenie vazhnoy zadachi)
"When the leader resigned, she stepped up to the plate and took charge."
"Когда лидер ушел в отставку, она взяла на себя ответственность и взяла под контроль ситуацию." (Kogda lider ushel v otstavku, ona **vzyala na sebya otvetstvennost'** i vzyala pod kontrol' situatsiyu.)
to accept that you are capable and worthy
to dismiss something as unimportant or not worth considering
the most advanced or innovative part of something
to identify and fix errors or problems in a computer program
to control or limit something
to prepare an official document or plan