decriminalize

verb
de·​crim·​i·​nal·​ize | \ (ˌ)dē-ˈkri-mə-nə-ˌlīz How to pronounce decriminalize (audio) , -ˈkrim-nəl-\
decriminalized; decriminalizing; decriminalizes

Definition of decriminalize

transitive verb

: to remove or reduce the criminal classification or status of especially : to repeal a strict ban on while keeping under some form of regulation decriminalize the possession of marijuana