adjective/biˈθaro/
dashing, brave, spirited, gallant; generous, magnanimous, noble
“[...]; y conociendo su posición se fortaleció con los auxilios de la religión, ostentando hasta en su último aliento la resignación de un buen cristiano, y espirando como el hombre de bien, y con la serenidad de un bizarro militar.” — …; and knowing his position he strengthened himself with the aid of religion, flaunting in his last breath the resignation of a good Christian, and expiring as the good man, and with the serenity of a noble soldier.
Synonyms: valiente, generoso
Presumably from the same source as bizarre, which may be Basque bizardun (“bearded”), from bizar (“beard”), or from Italian bizzarro, further etymology unknown. See English bizarre for more.