• (v. t.) To make bold; to encourage; to embolden.
Bold'en transitive verb [ imperfect & past participle Boldened ] To make bold; to encourage; to embolden. « Ready speakers, being boldened with their present abilities to say more, . . . use less help of diligence and study. Ascham. » 
(“Buddy”), 1868?–1931, U.S. cornet player: early pioneer in jazz.