secularize
From Longman Dictionary of Contemporary Englishsecularizesec‧u‧lar‧ize (also secularise British English) /ˈsekjələraɪz/ verb [transitive] SSORELIGIONto remove the control or influence of religious groups from a society or an institution —secularization /ˌsekjələraɪˈzeɪʃən $ -rə-/ noun [uncountable]→ See Verb tableExamples from the Corpussecularize• The modern attempt to secularize civilizations is really an attempt to substitute new religions for old.