What's the adjective for someone who accepts any challenge? Let's say a strong knight, who never says no to a challenge. Is there any adjective for it? Or what would be the best way to describe such trait? Thank you in advance.
Closest thing i can think of is:
UK /ˈdɔːnt.ləs/ US /ˈdɑːnt.ləs/
showing determination and no fear:
In spite of the scale of the famine, the relief workers struggled on with dauntless optimism.
The word I use for this is game:
Who could we talk into jumping off this cliff?
Ask Gordon, he's always game.