prolong [prolonged, prolonging, prolongs](to extend in space or length) verb [UK: prə.ˈlɒŋ] [US: prə.ˈlɒŋ]I'd like to prolong my stay in America. = Me gustaría prolongar mi estancia en América.
protract [protracted, protracting, protracts](To draw out; to extend, especially in duration.) verb [UK: prə.ˈtrækt] [US: proˈtrækt]