temerarious > define
adjective
- Presumptuously daring.
- usage: "a daredevil test pilot having the right stuff"
- synonyms: daredevil
by WordNet 3.0 © 2006 by Princeton University
(a.) Unreasonably adventurous; despising danger; rash; headstrong; audacious; reckless; heedless.
by Webster's Revised Unabridged Dictionary