The Collaborative International Dictionary of English v.0.48:
Devitalize \De*vi"tal*ize\, v. t. To deprive of life or vitality. -- De*vi`tal*i*za"tion, n. [1913 Webster]WordNet (r) 3.0 (2006):
devitalize v 1: sap of life or energy; "The recession devitalized the economy" [syn: devitalize, devitalise] [ant: vitalise, vitalize]