あきらめないでください。
断念するな
諦めるな。
絶対にあきらめないで。
あきらめないでがんばろう!
Let's not give up and try our best!
I don't intend to quit.
諦めてしまえ。
to abandon (something) completely
I don't give up quickly.
I will never give up on that.
諦めちゃだめよ。
All I can do is give up on that.
I have to give up on you.
I will not give up on that.