biretta

n square, usu black, cap worn by Roman Catholic priests 法冠（天主教教士戴的通常为黑色的四角帽）.

bipartisan, bipartite, biped, biplane, birch, bird, bird of paradise, bird of passage, bird of prey, bird sanctuary, bird-bath, bird-song, bird-table, bird-watcher, birdbrained, birdcage wire, birdie, birdlime (also lime), birds, birdseed, Birmingham, birth, birth certificate, birth rate, birth-control, birthday, birthmark, birthplace, birthrate, birthright, biscuit, bisexual, bisexuality, bishop, bishopric, bismuth, bison, bistro, bit, bit by bit,