suf·fuse \səˈfyüz\transitive verb (-ed/-ing/-s) Etymology: Latin suffusus, past participle of suffundere to pour underneath, suffuse, from sub- + fundere to pour — more at found (melt) 1.: to spread over or through in the manner of fluid or light : flush, fill < when purple light shall next suffuse the skies — Alexander Pope > 2.: to pour so as to overspread Synonyms:see infuse