boredom

n.厌烦

bootlace, bootleg, bootlegger, bootless, bootstrap, booty, booze, booze-up, boozer, boozy, boracic, borage, borax, Bordeaux, border, border on, borderer, borderland, borderline, bore, boric, boring, born, born of, born-again, borne, boron, borough, borrow, borrower, borrowing, borrowings, Borstal, bortsch (also borsch), borzoi, bos'n, bosh, bosom, bosom friend, bosomy,