Obligate,必须Synonym,Compel,RequireExplanation,Obligatemeanstoforcesomeonetodosomething,usuallythroughalegalormoralresponsibility。Compelandrequirearesimilarinmeaningtoobligateastheyalsomeantoforceormakesomeonedosomething。Extension,Otherwordsthatcouldbeusedassynonymsofobligateincludecoerce,constrain,andcompel。