How do you say 'the will to live' in Japanese?


Can someone translate the English phrase, 'the will to live' into accurate
Japanese? Is there an equivalent phrase in Japanese?

I've tried to translate each component separately:  
Component 1 = the will = ishi  
Component 2 = to live/to survive = seizon

So it becomes 'seizon no ishi'?

Can someone tell me if this is accurate? Or better yet, just give me the best
translation you can come up with.

Oh, and it would be extremely helpful if someone can give me romaji version of
the translation.

Thank you so much.




How about the interpretation in this text for " **a will to live** "?  
It says that " **a will to live** or **the will to live** " is "生きる意欲 _**ikiru
iyoku**_ "

> ### A Will to Live
>
> A: My aunt has joined a climbers' group. She is very strong-willed. She
> wants to climb the Matterhorn with the team.
>
> B: Really? But I heard she had lung cancer. When did she leave the hospice?
>
> A: She didn't. She hasn't recovered from the disease. It's supposed to be
> terminal, but the urge to climb the mountain has given her **the will to
> live**. This treatment is called "natural therapy"; no drugs or operations.

Source: 旺文社「英単語・熟語ダイアローグ１２００三訂版」




How about the interpretation in this text for " **a will to live** "?  
It says that " **a will to live** or **the will to live** " is "生きる意欲 _**ikiru
iyoku**_ "

> ### A Will to Live
>
> A: My aunt has joined a climbers' group. She is very strong-willed. She
> wants to climb the Matterhorn with the team.
>
> B: Really? But I heard she had lung cancer. When did she leave the hospice?
>
> A: She didn't. She hasn't recovered from the disease. It's supposed to be
> terminal, but the urge to climb the mountain has given her **the will to
> live**. This treatment is called "natural therapy"; no drugs or operations.

Source: 旺文社「英単語・熟語ダイアローグ１２００三訂版」

