以上单词均有废止和取消的含义。abolish指完全废除制度、 风俗、习惯等[1]，如 to abolish slavery, ignorance。abrogate 主要指对下属机构签发的命令、规则的废除，或经立法废除法规或习俗等，如abrogate certain privileges [2]。annul指终止某事务的存在或宣布其无效或从未真正存在过，如annul the marriage [3]。 rescind常用于合同的撤销，以及经同级或上级机构予以撤销或废除规定等，如rescind an order[4]。revoke主要指以收回或撤销以往授予或准予事项的形式予以废除或废止，或废除遗嘱效力， 如to revoke a charter [5]。repeal主要指以立法形式撤销或废除法规、命令、许可等，如 to repeal an amendment [6] 。
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[1]“ To do away with wholly. Applies particularly to things of a permanent nature, such as institutions, usages, customs, as the abolition of slavery. " Cf. The Publisher’s Editorial Staff, Black’s Law Dictionary, abridged 6th edition, at p. 3，West Publishing Co. (1991)_
[2] "To annul or repeal an order or rule issued by a subordinate authority ； to repeal a former law by legislative act, or by usage. ” Id. at p. 4.
[3]“To annul is either to end something existing or to declare that it never really existed. ” Cf. The Editors of the Reader's Digest, Use the Right Word, at p. 665, The Reader's Digest Association Proprietaiy Ltd. (1971).
[4] "With respect to a contract, for one or more parties to end it. ” Cf. Daphne Duke-low, The Dictionary of Canadian Law, at p. 916, Thomson Professional Publishing Canada (1991 ). "To make void by the same or by a superior authority. ” Cf. Linda Picard Wood, J. D.，Merriam Webster's Dictionary of Law, at p. 427，Meniam-Webster, Incorporated, Springfield, Massachusetts (1996).
[5]“To annul or make void by recalling or taking bake. ” Cf. The Publisher's Editorial Staff, Black's Law Dictionary，abridged 6th edition, at p. 915, West Publishing Co. (1991).
[6]“To abrogate an existing law by legislative act. ” Cf. Bryan A. Gamer, Black's Law Dictionary, 7th edition, at p. 1301 , West Group (1999).