painlessEnglishOxford New American Dictionarypainless /ˈpānləs, ˈpeɪnləs / ▸ adjective not causing or suffering physical pain: a painless death. ▪ involving little effort or stress: a painless way to travel. – DERIVATIVES painlessness /ˈpānləsnəs, ˈpeɪnləsnəs / noun