This is the 652nd most frequent Czech word.
životní
"Životní" means "life" or "of life" in English, often relating to life or living.
Here, 'životní' means 'life-related', describing 'goals' pertaining to a person's life.
Každý člověk má své vlastní životní cíle.
Every person has their own life goals.
In this context, 'životní' conveys something of great importance or critical impact on one's life.
Zjistil jsem, že to bylo mé životní rozhodnutí.
I realized that this was my life-changing decision.
Here, 'životní' modifies 'prostředí' (environment), referring to aspects concerning life or livelihood.