Как бы я ни стара́лся, я не мог реши́ть зада́чу.
However hard I tried, I could not solve the problem.
1. стара́ться verb, imperfective
Often used word (top 500)
try hard, strive
2. реши́ть verb, perfective
Daily used word (top 300)
decide, determine, resolve, be determined, solve
Я зна́ю, как реши́ть пробле́му.
I know how to solve the problem.
3. пробле́ма noun, feminine, inanimate
Often used word (top 500)
problem
Не создава́йте пробле́мы.
Don't make trouble.
4. создава́ть verb, imperfective
Somewhat often used word (top 2,000)
create, originate, set up, establish, found
Страсть создаёт страда́ние.
Passion creates suffering.
5. страсть noun, feminine, inanimate
Somewhat often used word (top 2,000)
passion, obsession, strong love between people, religion
6. страда́ние noun, neuter, inanimate
Somewhat often used word (top 3,000)
suffering