to stop dealing with or thinking about something
何かについて考えたり関わったりするのをやめる (nanika ni tsuite kangaetari kakawattari suru no o yameru)
"After years of conflict, they finally closed the book on their rivalry."
"長年の対立の末、彼らはついにその競争に終止符を打った。" (naganen no tairitsu no sue karera wa tsuini sono kyoso ni shushifu o utta)
to contact someone to exchange updates
to start being broadcast on television or radio
to control people very strictly and harshly
to take control or responsibility for something
To risk everything on one big decision.
to be responsible for something and able to explain it