チャレンジ

Etymology
From. Compare.

Noun

 * 1) an attempt; an endeavor; striving

Verb

 * 1) to attempt; to endeavor; to strive

Usage notes

 * This word has shifted meaning from the English word from which it came. It refers to challenging oneself, or taking on a challenge, rather than an attack on something. Therefore this word should be used when the speaker is taking on a new task, a new challenge. It is not to be translated literally as the verb challenge, or one will end up with sentences like "he is a challenging person" or "I will challenge tennis."