相关单词同义词debt, liability, 近义词 charge, duty反义词choice, freedom临近词obligatory, obligate, obligations, obligation fee, obligation law, obligation bond, obligation well, obligation sale, obligation fees, obligation right, obligation model, obligation of tax相似词objective, objector, objet d'art, oblation, obligatory, oblige, oblige sb with sth, obliged, 返回 obligation