Will to Cooperate Synonym?

What is a word to describe someone who never gives up?

Tenacious is a mostly positive term. If someone calls you tenacious you're probably the kind of person who never gives up and never stops trying – someone who does whatever is required to accomplish a goal. You may also be very stubborn. B.

What is a word for willing to try new things?

To be adventurous is to be willing to try new things (not necessarily action-packed). Uninhibited often is used in the sense you ask for. Near-synonyms include unrestrained, unchecked, uncontrolled, unfettered, free, unbound, unconstrained, wild or unruly, unbridled, boundless, limitless, unstultified.