What does チャレンジ mean?
チャレンジ is a Japanese noun meaning “taking on (a challenge); attempt; try; tackling” in English. It can also be translated as “requesting a video review (of a referee's call)” depending on context. It is written as チャレンジ in hiragana, and charenji in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
テニスにチャレンジすれば？
Why don't you give tennis a try?