sub·stan·tivize \ˈ ̷ ̷ ̷ ̷_tiˌvīz, ̷ ̷ˈ ̷ ̷təˌv-\transitive verb orsub·stan·tize\ˈ ̷ ̷ ̷ ̷.ˌtīz\ (-ed/-ing/-s) Etymology:substantivize from substantive (I) + -ize; substantize from substantive (I) + -ize : to convert into or use as a substantive < an adjective can easily be substantivized >