チャレンジせいしん
(attitude of) being ready to take on a challenge; can-do spirit
Noun
チャレンジ精神せいしん旺盛おうせいだね。
You are fully up to the challenge, right.
今度こんどの新人しんじんは、チャレンジ精神せいしん旺盛おうせいでいいね。
I like the new guy. He's not afraid to take on challenging work.