费力 (fèi lì): Strenuous (Verb) — Meaning & Stroke Order

I moved the box with effort.

Learning a new language is laborious but interesting.

What goal are you striving for by preparing this speech so strenuously?

He solved that seemingly complex math problem without much strenuous effort.

He painstakingly explained the complex concept, hoping we could understand.

Although the process was strenuous, the ultimate success brought him immense satisfaction.