What Does by a Dint of Hard Pulling Mean

If you achieve a result by dint of something, you achieve it by means of that thing. [written] He succeeds by dint of sheer hard work.

What is the meaning of the idiom by dint of?

If you achieve a result by dint of something, you achieve it by means of that thing. [written] He succeeds by dint of sheer hard work.

Is by dint of formal?

by dint of something/doing something (formal) as a result of (doing) something; through: By dint of sheer hard work, she managed to pass all her exams.