What is the concept of challenge?
A challenge is something that puts you to the test — like running your first marathon or reading War and Peace. Challenge, as a verb, is derived from a Latin word meaning “to accuse falsely,” and it is still used much as it was in the 13th century, in the sense of questioning whether something is true or right.
What do you mean by challenging job?
1. adjective. A challenging task or job requires great effort and determination. Mike found a challenging job as a computer programmer. I’m ready to do all those things which are more challenging.