费劲 (fèi jìn): Strenuous (Verb) — Meaning & Stroke Order

It is indeed very strenuous to persuade the stubborn him to change his mind.

Advancing this project with limited resources is a rather strenuous process.

Do you feel it's worth the strenuous effort you're putting into learning this new language?

After mastering the method, completing this task is not strenuous at all.