挑战 (tiǎo zhàn): เพื่อท้าทาย

The company decided to send him to open up a new overseas market, which is a huge challenge for him.

The problems in this math competition are very difficult, but I am willing to challenge myself and strive for a good result.

He accepted the opponent's challenge and decided to compete for superiority in the next match.

Learning a foreign language requires facing many challenges, such as memorizing words and practicing pronunciation.