valeroso

adj. gallant, plucky

adj. valuable (Archaic)

= determined, valiant, courageous, plucky [pluckier -comp., pluckiest -sup.].
Ex: The fifteenth edition, published in 1951, represented a determined effort to update and unify the schedules.
Ex: Manchester Public Libraries are making a valiant attempt to offer a suitable facility despite over-crowding and lack of space.
Ex: One of the most effective ways of combatting racism is through enlightened, moderate and courageous work colleagues.
Ex: Steel's book exemplifies what might be termed the subgenre of 'Mutiny novel,' using such conventional characters as the plucky Englishwoman, the unflappable English gentleman-spy, and the crazed religious zealot.