adjective

brave and persistent.

his doughty spirit kept him going

fearless,dauntless,determined,resolute,indomitable,intrepid,plucky,spirited,game,mettlesome,gritty,steely,confident,undaunted,undismayed,unalarmed,unflinching,unshrinking,unabashed,unfaltering,unflagging,bold,audacious,valiant,brave,stout-hearted,lionhearted,gallant,courageous,heroic,daring,daredevil,gutsy,spunky,ballsy,feisty