to refuse to give up or change your position
自分の立場を変えず、諦めない (jibun no tachiba wo kaezu, akiramenai)
"He dug in his heels and refused to quit until he succeeded."
"彼は頑固に自分の立場を守り、成功するまで諦めなかった。" (Kare wa **ganko ni jibun no tachiba wo mamori**, seikou suru made akiramenakatta.)
to refuse to change your opinion or position
there is hope for success in the future
to introduce or create new concepts or methods
to protect your computer system or network from attacks
the time for something or someone has ended
to be brave enough to have big ambitions
