彼は結構しぶといね。転んでもただでは起きぬ、いい根性しているよ。

He's a tenacious guy who always manages to come out on top. He's the kind of guy who can turn any situation to his advantage.

セッティングは整えておいたから、後はまーくんが根性見せなきゃダメだからね？

I've set the stage so now you just have to show some guts, OK?

貧乏するとこじき根性がでる。

When a man becomes poor, the beggar in him will come out.